This page provides information supervised by specialist physicians at IC Clinic Omiya, a 1-minute walk from JR Omiya Station East Exit.

🏥 Inflamed Epidermoid Cyst Treatment in Saitama (Omiya): A Comprehensive Guide

An inflamed epidermoid cyst occurs when bacteria enter an existing epidermoid cyst, causing inflammation and suppuration.

An inflamed epidermoid cyst develops from an ordinary cyst and causes pain as symptoms worsen, so prompt treatment is necessary rather than leaving it untreated.

🔍 What Is an Inflamed Epidermoid Cyst (Atheroma)? Symptoms and Causes

In the early stages, an epidermoid cyst typically causes no pain and may only be felt as a firm lump under the skin.

However, when bacteria enter and cause inflammation, the area becomes red and swollen, accompanied by pain.

This condition is called a inflamed epidermoid cyst (えんしょうせいふんりゅう) or a suppurative epidermoid cyst (かのうせいふんりゅう).

※ Throughout this article, we will use the term “inflamed epidermoid cyst” for consistency.

⚠️ Risks of Leaving an Atheroma (Epidermoid Cyst) Untreated: Suppuration and Unpleasant Odor

The greatest danger of leaving an atheroma (epidermoid cyst) untreated is that over time, the waste matter accumulated inside may decompose, or bacteria may enter from outside and cause infection, leading to inflammation and suppuration.

• 🔥 Progression of Inflammation and Suppuration
  The interior of the cyst sac is prone to accumulating dead skin cells and sebum, creating an environment where bacteria can multiply easily.
  In particular, when bacteria enter through the small central opening known as the “punctum,” infection can spread rapidly, triggering inflammation.
  Once inflammation sets in, the cyst becomes red and swollen, accompanied by intense throbbing pain.
  As the condition worsens further, pus accumulates inside, creating a boil-like state in which the area feels warm to the touch and the skin surface appears raised.
• 😷 Development of Unpleasant Odor
  The old keratin and sebum that have built up inside the sac are broken down by bacteria, producing a distinctive unpleasant odor.
  This odor can become strong enough to be noticeable not only to you but also to those around you, causing psychological distress in daily and social life.
• 💥 Rupture and Increased Treatment Complexity
  As suppuration advances and the pressure inside reaches its limit, the cyst may rupture spontaneously, releasing pus and decomposed contents.
  Although pain may ease temporarily, the open wound becomes more susceptible to further bacterial entry, risking spread of inflammation to surrounding skin and potentially causing a widespread skin infection known as cellulitis.
  Furthermore, a ruptured cyst is prone to adhesion with surrounding tissue, which means subsequent surgery becomes more complex and scarring is more likely.
• 📈 Enlargement
  Repeated cycles of inflammation and rupture can cause the cyst sac to grow larger, putting pressure on surrounding tissue and becoming more visibly prominent as a large lump.
  As it grows, the extent of surgery required also increases, affecting both cost and recovery time.

🚫 Never Attempt to Pop an Atheroma (Epidermoid Cyst) Yourself

You may feel bothered by an atheroma (epidermoid cyst) and be tempted to pop it yourself due to its appearance or discomfort.
However, please never attempt to pop or squeeze an epidermoid cyst on your own.
Doing so carries various serious risks and is very likely to worsen your condition.

Attempting to pop a cyst yourself can lead to the following problems 👇

• 🦠 Increased Risk of Bacterial Infection
  Using your fingers, fingernails, or an unsterilized needle to pop a cyst breaks the skin, significantly increasing the likelihood that large numbers of bacteria will enter the interior of the cyst sac.
  This can further aggravate inflammation, promote suppuration, and raise the risk of serious infections such as cellulitis in the surrounding skin.
• 😣 Worsening Inflammation and Increased Pain
  Forcibly popping the cyst can cause the internal sac to rupture, allowing its contents to spread into surrounding tissue and triggering a strong inflammatory response.
  This can cause intense pain, swelling, and warmth to worsen significantly, seriously interfering with daily activities.
• 💔 Scar Formation
  When inflammation or infection becomes severe, noticeable scarring is more likely to remain during the healing process.
  This can be a particular cosmetic concern in visible areas such as the face.
• 🔄 Risk of Recurrence
  The definitive treatment for an epidermoid cyst is complete removal of the “sac” (cyst wall) together with its contents.
  Even if you pop the cyst yourself, if any part of the sac remains, the contents will gradually accumulate again over time, leading to a high likelihood of recurrence.
  Repeated recurrences can also make treatment progressively more difficult.
• ⏰ Delayed Diagnosis
  Attempting self-treatment may delay the timing of seeking proper medical care.
  While rare, malignant tumors that resemble epidermoid cysts in appearance do exist.
  A consultation with a specialist enables an accurate diagnosis and appropriate treatment plan.

📏 Why Atheromas (Epidermoid Cysts) Grow Larger and How to Address Them

Once an atheroma (epidermoid cyst) forms, it almost never resolves on its own. In most cases, it gradually grows larger over time.
The main reason for this growth is the continuous accumulation of old keratin and sebum within the sac.

• 🔄 Continuous Production of Contents
  The cyst sac is formed from a portion of skin that has turned inward.
  As a result, the cells lining the inside of the sac continue to produce keratin just as normal skin does.
  The ongoing accumulation of this keratin and sebum inside the sac causes the cyst to gradually expand.
• 🔥 Repeated Inflammation
  When an epidermoid cyst becomes inflamed, the surrounding tissue swells and the cyst itself may feel temporarily larger.
  Even after the inflammation settles, contents continue to accumulate, and with each subsequent episode of inflammation the cyst can enter a worsening cycle of further enlargement.
  Repeated inflammation tends to thicken the cyst wall and cause adhesion to surrounding tissue, contributing to further growth.
• 👔 Irritation and Friction
  Chronic irritation from clothing rubbing against the cyst, physical pressure, or compression can predispose the cyst to inflammation, which in turn can lead to further enlargement.

💡 What to Do When an Atheroma (Epidermoid Cyst) Has Grown Larger

As a cyst grows, symptoms such as pain and odor become more pronounced, and it increasingly interferes with daily life (catching on clothing, being uncomfortable when sitting, etc.).
Furthermore, the larger the cyst grows, the wider the surgical incision required and the more likely scarring becomes.

Therefore, if you feel that your atheroma (epidermoid cyst) has been growing larger, please consider the following points and seek medical attention promptly 👇

1. 🏥 Early Consultation with a Specialist
   Treating a cyst while it is still small means less surgical burden and less noticeable scarring.
   Before it grows larger, please consult a specialist at a dermatology or plastic and reconstructive surgery clinic to discuss an accurate diagnosis and appropriate treatment plan.
2. 🔪 Considering Appropriate Surgery
   The definitive treatment for an epidermoid cyst is surgical removal of the entire “sac” (cyst wall) together with its contents.
   Surgery is ideally performed when the cyst is not inflamed.
   If inflammation is present, the approach is typically to first perform a procedure to drain the pus (incision and drainage), then plan definitive surgery to remove the sac at a later date.
3. 🚫 No Self-Treatment
   A larger cyst has even greater internal pressure, meaning that attempting to pop it yourself carries an increased risk of serious infection or worsening inflammation.
   Please never touch, squeeze, or attempt to pop it on your own.

💊 Symptoms of an Inflamed Epidermoid Cyst

When an epidermoid cyst becomes inflamed or suppurates, it becomes red and swollen, accompanied by pain.

In cases of severe suppuration, the sac-like structure beneath the skin is destroyed and pus accumulates inside.

This condition is also referred to as an abscess (膿瘍 / のうよう) and is accompanied by intense pain.

🔬 Medical Causes of Inflammation in an Epidermoid Cyst

The medical cause of inflammation is bacteria entering through the central opening (punctum) of the cyst.

An epidermoid cyst is a benign tumor that forms when dead skin cells, sebum, and other waste matter accumulate beneath the skin.

Epidermoid cysts do not resolve on their own; if left untreated, they gradually develop into a larger sac-like structure, and bacterial entry into this sac triggers inflammation.
(※ Reference: What Is an Epidermoid Cyst?)

The interior of the cyst sac inherently lacks immune cells (which normally fight off invading bacteria), making it susceptible to bacterial infection.

In particular, touching or squeezing the cyst out of habit can introduce bacteria and trigger an inflamed epidermoid cyst, so try to avoid touching it as much as possible.

🧠 Psychological Causes of Inflammation in an Epidermoid Cyst

In some cases, an inflamed epidermoid cyst may be triggered by “psychological complacency” — the attitude of “it’s just a lump, so I can leave it alone” or “it’s benign, so there’s no problem ignoring it.”

As noted above, epidermoid cysts do not resolve on their own and are susceptible to bacterial infection.

Nevertheless, some patients only visit a medical facility after leaving the cyst untreated until it becomes inflamed and painful.

For anyone reading this article, we strongly recommend not leaving the cyst untreated and contacting a medical facility capable of treating epidermoid cysts as soon as possible.

⚠️ [Important] See a Clinic Before Your Inflamed Epidermoid Cyst Ruptures

An inflamed epidermoid cyst has progressed beyond an ordinary cyst and carries increased risks.

Touching it carelessly can cause it to rupture, so please visit a medical facility for examination before that happens.

In fact, an inflamed epidermoid cyst carries the risk of rupturing even during everyday activities.

💥 What Causes an Inflamed Epidermoid Cyst to Rupture

An inflamed epidermoid cyst can often rupture with even a slight impact.

Once a cyst becomes infected with bacteria and develops into an inflamed epidermoid cyst, the sac-like structure becomes fragile and prone to tearing.

What begins as a firm lump gradually softens as inflammation progresses, and you may notice that the area feels warm to the touch.

Once softened, even a light bump or gentle pressure can cause it to rupture and release pus.

If the sac tears, pus spreads to the surrounding area, causing further worsening of inflammation.

The area becomes red and swollen, and as the condition advances, the opening may become raw and widened, releasing malodorous pus and cyst contents.

This state in which pus drains spontaneously is called “spontaneous rupture” (自壊 / じかい).

🚨 What to Do If Your Cyst Ruptures and Releases Its Contents

If a cyst ruptures and releases its contents during daily life, seek medical attention at a healthcare facility as soon as possible.

In cases of severe suppuration, a surgical procedure to incise the skin and drain the accumulated pus (incision and drainage) may be performed.

Because this involves a surgical procedure, it is advisable to visit a hospital or clinic with substantial expertise in epidermoid cyst surgery.

💡 If You Have Ruptured Your Cyst, Please Consult IC Clinic

If you were touching your epidermoid cyst and it ruptured, leaving the area red and swollen, please contact IC Clinic right away.
Inflamed epidermoid cysts are prone to scarring, so treatment as early as possible is advisable.
We will suggest a treatment approach designed to minimize discomfort and keep scarring as inconspicuous as possible, so you can feel at ease.
In addition, epidermoid cyst surgery at our clinic is covered by Japanese public health insurance, so you can proceed with confidence regarding costs.
The procedure is typically completed in around 20 minutes at most, making same-day surgery possible.

🏥 Treatment for Atheromas (Epidermoid Cysts) | Surgical Removal as the Definitive Approach

An atheroma (epidermoid cyst) cannot be treated with medication alone.
The definitive treatment involves surgical removal of the entire “sac” (cyst wall) along with its contents — not just the contents themselves.

✂️ Surgical Techniques for Atheromas (Epidermoid Cysts): Punch Excision (Punch-Out Method) and Fusiform Excision

There are two main surgical techniques for treating an atheroma (epidermoid cyst): the “punch excision (punch-out method)” and “fusiform excision”.
Which technique is selected depends on factors such as the size and location of the cyst and the presence or absence of inflammation, as determined by the physician.

🔍 Surgical Technique	✅ Features (Advantages)	⚠️ Disadvantages / Points to Note	💡 Indications
Punch Excision (Punch-Out Method)	・Minimal scarring: Contents and sac are removed through a small hole a few millimeters in diameter, leaving a less noticeable scar. ・Faster recovery: Little or no suturing is required, resulting in less postoperative swelling and pain, with a tendency toward a shorter healing period. ・Less physical burden: The procedure is completed quickly and can be performed under local anesthesia alone.	・Not suitable during inflammation: When inflammation is significant or suppuration is present, the sac becomes fragile and complete removal may not be possible, so this method is often not chosen in such cases. ・Recurrence risk: In rare cases, a small portion of the sac may be left behind, resulting in recurrence. ・Technical skill required: Precise removal of the sac through a small opening requires a high level of physician expertise.	・Non-inflamed epidermoid cysts: Cysts that are settled, with no redness or pain. ・Relatively small cysts: Those approximately 2 cm in diameter are often indicated, though slightly larger cysts may also be suitable with sufficient skill. ・Particularly recommended for cysts in cosmetically sensitive areas such as the face or neck where minimal scarring is desired.
Fusiform Excision	・Reliable removal: Because a wider incision is made, the entire cyst sac can be visualized and removed with confidence, with minimal risk of leaving tissue behind — the primary advantage of this technique. ・Applicable to inflamed cysts: Even when inflammation or suppuration is significant, it is sometimes possible to incise, drain the pus, and remove the sac in the same procedure. In cases of severe inflammation, a two-stage approach may be used: first draining the pus, then performing definitive removal once inflammation has settled. ・Low recurrence risk: Complete removal of the sac results in a very low risk of recurrence.	・Larger scar: A wider incision is required based on the size of the cyst, making the resulting scar larger than that of the punch excision method. ・Longer recovery: Suturing is usually required, and healing — including the period until suture removal — tends to take more time. ・Slightly greater physical burden: Although performed under local anesthesia, this technique is more invasive than the punch excision method.	・Inflamed epidermoid cysts: Cysts that are red and swollen or contain accumulated pus. ・Larger cysts: Relatively large cysts 3 cm or more in diameter, or cysts located deep beneath the skin. ・Cases where punch excision is difficult, or where the cyst has ruptured and become adherent to surrounding tissue.

🎯 What Is the Punch Excision (Punch-Out) Method for Atheromas (Epidermoid Cysts)?

The “punch excision method,” also known as the “punch-out method,” is a surgical technique in which a small punch-like instrument is used to create a small opening at or near the central punctum of the atheroma (epidermoid cyst), through which the cyst sac is cored out and removed.

📋 Procedure Steps:

1. Local anesthesia: Local anesthetic is first injected into the cyst and the surrounding area.
2. Small incision or puncture: A small opening approximately 2–5 mm in diameter is made at the central punctum of the cyst or nearby.
3. Drainage of contents: Pressure is applied through the small opening to express the keratin, sebum, and other contents from inside the cyst.
4. Removal of the cyst wall: Once the contents have been expressed, the sac (cyst wall) is carefully peeled away using specialized forceps and fully extracted. Care is taken throughout this step to avoid tearing the sac.
5. Completion: After confirming complete removal of the sac, the wound is typically left to heal naturally without suturing, though a small amount of suturing may be performed in some cases. The wound is small and generally closes within a few days.

✨ Advantages:

• Cosmetically favorable: The primary advantage is that the resulting scar is very small and less noticeable. This method is particularly well suited to cosmetically sensitive areas such as the face and neck.
• Less physical burden: The procedure is brief (typically 10–20 minutes) with minimal bleeding, placing a lighter burden on the patient.
• Faster recovery: Because the wound is small, postoperative swelling and pain are minimal and return to daily activities is faster.

🔪 What Is Fusiform Excision for Atheromas (Epidermoid Cysts)?

“Fusiform excision” is a technique in which the skin directly over the atheroma (epidermoid cyst) is incised and the entire cyst sac is removed under direct visualization — the most reliable surgical approach.

📋 Procedure Steps:

1. Local anesthesia: Local anesthetic is injected into the cyst and the surrounding area.
2. Skin incision: The skin is incised in a fusiform (elliptical) shape along the long axis of the cyst, sized to the cyst.
3. Dissection and removal of the cyst wall: The cyst sac (cyst wall) is carefully dissected away from the surrounding tissue and completely removed. Care is taken throughout to avoid rupturing the sac.
4. Hemostasis and suturing: Bleeding is controlled, and the skin is carefully sutured after removal. The skin surface is typically closed with sutures.
5. Completion: The wound is covered with gauze or tape for protection. A follow-up visit for suture removal will be required at a later date.

✨ Advantages:

• Reliability: Because the entire sac is visualized and removed directly, there is minimal risk of leaving tissue behind. The very low risk of recurrence is the primary advantage.
• Wide applicability: This technique can address a variety of cyst conditions, including inflamed cysts, suppurating cysts, large cysts, and cysts with complex shapes. When inflammation is severe, a two-stage approach may be used — first draining the pus, then performing definitive removal of the sac once inflammation has settled.

The choice between the two techniques is made by thorough discussion between you and your physician, taking into account the overall condition of your cyst and your preferences regarding scarring.

🏠 Is Same-Day (Day Surgery) Available for Atheromas (Epidermoid Cysts)?

Many atheromas (epidermoid cysts) can be treated as same-day surgery.
This is because the procedure itself is performed under local anesthesia and is completed in a relatively short time.

• ✅ Typical Cases
  For small, stable, non-inflamed cysts, surgery can be performed in an outpatient setting under local anesthesia, with the patient returning home the same day.
  The duration of surgery varies depending on the size and number of cysts and the technique selected, but it is generally completed in 10 to 30 minutes.
• 💰 Advantages of Same-Day Surgery
  • Less time commitment: No hospitalization is required, minimizing disruption to daily life and work.
  • Less psychological burden: There is no need to adjust to an unfamiliar hospital stay, and you can recover in the comfort of your own home, reducing psychological stress.
  • Lower financial burden: No inpatient costs, helping to keep overall medical expenses down.
• ⚠️ Exceptional Cases (Where Hospitalization May Be Required)
  However, not all atheromas (epidermoid cysts) can be treated as same-day surgery.
  In the following situations, hospitalization may be required or more careful planning may be necessary.
  • Very large cysts: Extremely large cysts exceeding several centimeters in diameter
  • Severely inflamed or suppurating cysts: Cysts that have formed an abscess with severe inflammation
  • Patients with unstable general health: Patients with serious underlying conditions such as heart disease or diabetes
  • Cysts in special locations: Near joints or in areas close to important blood vessels or nerves

💵 How Much Does Atheroma (Epidermoid Cyst) Surgery Cost? Health Insurance Coverage

One of the most common concerns when considering atheroma (epidermoid cyst) surgery is the “cost”.
As epidermoid cyst surgery is generally covered by Japanese public health insurance, the out-of-pocket cost is relatively manageable.

💰 Approximate Surgery Costs for Atheromas (Epidermoid Cysts)

Surgery costs for atheromas (epidermoid cysts) vary depending on the size and location of the cyst, the presence or absence of inflammation, and the surgical technique selected.

The following are approximate surgery costs under public health insurance (30% patient co-payment) 👇

📏 Cyst Size / Condition	💰 Approximate Cost (30% co-payment)	📝 Notes
Small (under 3 cm in diameter, no inflammation)	Approx. ¥5,000–¥10,000	・Punch excision or small incision is most commonly used. ・The lowest-cost scenario. ・Initial consultation fee, examination fee, local anesthesia, prescription medications (antibiotics, pain relief, etc.), and postoperative dressing fees may be charged separately.
Medium (3 cm or more but under 5 cm, no inflammation)	Approx. ¥10,000–¥15,000	・Fusiform excision is most commonly selected. ・Cost is higher than for small cysts due to the wider surgical area. ・Pathological examination costs may be added in some cases.
Large (5 cm or more in diameter, no inflammation)	Approx. ¥15,000–¥25,000	・Fusiform excision is almost always required. ・Greater surgical complexity and time involved means higher costs. ・Pathological examination costs are virtually certain to apply.
Cysts with inflammation or suppuration	Incision and drainage: Approx. ¥3,000–¥5,000 Definitive surgery (later): Above amounts plus applicable size-based surgical cost	・When suppuration is present, an incision and drainage procedure is first performed to release the pus. ・This procedure itself incurs a fee, and definitive surgery to remove the cyst sac is subsequently required, meaning total costs tend to be higher. ・In severe cases of inflammation, more follow-up visits may be needed, adding further consultation and treatment fees.

⚠️ Please note: The costs above are approximate estimates and may vary depending on the medical facility, region, and specific treatment details.

・In most cases, fees are charged separately for initial and follow-up consultations, test fees (including pathological examination), anesthesia, prescribed medications (antibiotics, pain relief, antiseptics, etc.), and postoperative dressing.

Including these, the total amount may be higher than the estimates above.

・Depending on your health insurance plan or local municipality, you may be eligible for the High-Cost Medical Expense Benefit (Kōgaku Ryōyō-hi) or other medical subsidy schemes — it is worth checking.

・For accurate cost information, please contact the medical facility you plan to visit directly, or ask the physician or reception staff at the time of your consultation.

✅ Is Epidermoid Cyst Surgery Covered by Health Insurance?

To give the short answer: atheroma (epidermoid cyst) surgery is covered by Japanese public health insurance in most cases.
This is because epidermoid cysts are medically classified as “benign skin tumors” and are considered conditions requiring treatment due to the risk of inflammation and infection.

✅ Cases Where Insurance Applies:

• The cyst has grown large enough that it interferes with daily life (rubbing against clothing, causing pain when sitting, etc.).
• The cyst is inflamed or suppurating.
• There is pain or an unpleasant odor.
• Even when the concern is primarily cosmetic, if the physician determines that medical treatment is necessary.

❌ Cases Where Insurance May Not Apply:

• If the cyst is very small, completely asymptomatic, and medically has little need for treatment, and the patient requests surgery solely for cosmetic reasons (“I just want it to look better”), insurance coverage may not apply.
  In that case, the procedure would be classified as “private pay” (jiyū-shinryō), and the full cost would be out of pocket.
  However, given the future risk of inflammation and cosmetic changes associated with most atheromas (epidermoid cysts), they are frequently deemed to require medical treatment, meaning cases classified as purely cosmetic are rare.

🏥 The Importance of Confirming with Your Medical Facility — Before undergoing surgery, always ask the reception staff or your physician “Will this be covered by health insurance?”

This is particularly important at cosmetic surgery clinics, which may specialize exclusively in private-pay procedures, so it is essential to confirm in advance.

🩺 How Is an Inflamed Epidermoid Cyst Treated?

So how is an epidermoid cyst treated when it has become inflamed?

The definitive treatment for an inflamed epidermoid cyst is surgery.

Specifically, there are two main surgical techniques: “fusiform excision” and “punch excision (punch-out method)“.

Let us look at each treatment approach in turn 👇

💉 (1) Treatment Approach: Fusiform Excision

Because resolving the inflammation takes priority, incision and drainage is performed before the definitive surgery.

“Incision and drainage” refers to a procedure in which the skin is made a small incision to allow the accumulated pus to drain.

Once the inflammation has settled, the cyst is then surgically removed.

The surgical technique itself is straightforward: the skin is incised in a fusiform (elliptical) shape, the cyst is removed, and the wound is sutured closed.

With careful suturing, the scar tends to become less noticeable over time.

For inflamed epidermoid cysts, this approach tends to yield better postoperative outcomes than attempting punch excision.

🎯 (2) Treatment Approach: Punch Excision (Punch-Out Method)

The “punch excision method” uses a special punch-like instrument to create a small hole in the cyst, through which the cyst contents are expressed and the deflated cyst sac is then extracted.

The punch excision method is generally known for its advantages of “minimal, less noticeable scarring” and “very short procedure time.”

Even for inflamed epidermoid cysts, same-day surgery using the punch excision method may be possible, depending on the physician’s assessment.

→ For more information about epidermoid cyst surgery, please see ‘What Is an Epidermoid Cyst (Atheroma)? A Guide to Treatment.’

💊 Are Medications Effective for Inflamed Epidermoid Cysts?

In treating an inflamed epidermoid cyst, antibiotics may be prescribed to reduce inflammation.

Taking antibiotics may relieve the pain, but it is important to note that this only means the bacterial infection causing the pain has settled — the cyst itself has not been removed.

While this approach is effective for the infection, it is not sufficient as a treatment for the cyst itself.

Surgical intervention remains necessary for definitive treatment of an epidermoid cyst.

💰 Treatment Costs for Inflamed Epidermoid Cysts

Please be assured that health insurance applies to the diagnosis, testing, surgery, and pathological examination involved in epidermoid cyst treatment.

The following are approximate treatment costs at IC Clinic 👇

Approximate Epidermoid Cyst Surgery Costs (30% patient co-payment)
Exposed areas	Under 2 cm	Approx. ¥5,000–¥6,000
	2 cm – under 4 cm	Approx. ¥11,000–¥12,000
	4 cm or more	Approx. ¥15,000–¥16,000
Non-exposed areas	Under 3 cm	Approx. ¥4,000–¥5,000
	3 cm – under 6 cm	Approx. ¥10,000–¥11,000
	6 cm or more	Approx. ¥12,000–¥14,000
※ As there have been reports of malignant tumors arising from epidermoid cysts, pathological examination is in principle performed based on the physician’s judgment. ※ In cases of multiple cysts, simultaneous surgery on adjacent sites may be possible in some cases, subject to the physician’s assessment. ※ In addition to the surgery costs above, consultation and prescription fees of approximately ¥1,000, test fees of approximately ¥1,000, and pathological examination fees of approximately ¥3,000 will apply separately.

Approximate Epidermoid Cyst Surgery Costs (10% patient co-payment)
Exposed areas	Under 2 cm	Approx. ¥2,000
	2 cm – under 4 cm	Approx. ¥4,000
	4 cm or more	Approx. ¥5,000
Non-exposed areas	Under 3 cm	Approx. ¥1,500
	3 cm – under 6 cm	Approx. ¥3,500
	6 cm or more	Approx. ¥4,500
※ From October 1, 2022, patients aged 75 and over with income above a certain level will have an increased out-of-pocket co-payment rate. ※ As there have been reports of malignant tumors arising from epidermoid cysts, pathological examination is in principle performed based on the physician’s judgment. ※ In cases of multiple cysts, simultaneous surgery on adjacent sites may be possible in some cases, subject to the physician’s assessment. ※ In addition to the surgery costs above, consultation and prescription fees of approximately ¥300, test fees of approximately ¥300, and pathological examination fees of approximately ¥1,000 will apply separately.

❓ Frequently Asked Questions About Inflamed Epidermoid Cysts

Finally, here are answers to some common questions about epidermoid cysts. Please read the sections that concern you 👇

🤔 Q: My epidermoid cyst has turned red, but I have no pain. Should I still see a doctor?

Yes — we recommend visiting a clinic even if there is no pain.

This is because mild inflammation has already set in, and if left unaddressed, the redness may intensify and swelling and pain may follow.

Even if surgery to remove the cyst becomes necessary, seeking care at an early stage makes it easier to treat in a way that minimizes visible scarring.

Therefore, if your epidermoid cyst is red even without pain, please visit a clinic.

🤔 Q: Can an epidermoid cyst become malignant?

Malignant transformation of an epidermoid cyst is extremely rare.

There is no way to distinguish an ordinary cyst from a malignant one based on symptoms or appearance alone, but pathological examination of the surgically removed cyst material can determine whether it is malignant.

🏥 For Inflamed Epidermoid Cyst Treatment in Saitama (Omiya), Please Consult IC Clinic Omiya
In this article, we have covered the characteristics, causes, treatment approaches, and costs associated with inflamed epidermoid cysts.
Because an inflamed epidermoid cyst represents a progression beyond an ordinary cyst, we recommend seeking surgical definitive treatment as soon as possible.

To reduce the likelihood of scarring after treatment as much as possible, we encourage you not to leave the cyst untreated but to come in for a consultation.

We are able to suggest a surgical approach designed to minimize discomfort and reduce the risk of visible scarring, tailored to your specific condition.

If you are experiencing difficulties due to an inflamed epidermoid cyst, please feel free to contact us.

✨ 4 Features of IC Clinic

💎 (1) Specialist Treatment Focused on Results

Our experienced specialist physicians are committed to outcome-focused treatment designed to minimize the burden on each patient.

🎯 (2) Treatment Plans Tailored to Your Symptoms and Wishes

We listen carefully to your concerns and worries and provide you with the most appropriate treatment plan for your situation.

💉 (3) Minimal Discomfort — Clean, Careful Scarring

From our range of treatment options, we select the approach that minimizes patient discomfort and leaves as little lasting impact as possible after the procedure.

👥 (4) A Welcoming Clinic for Patients of All Ages and Backgrounds

We strive to create a clinic environment where anyone — regardless of age or gender — feels comfortable coming to us with their concerns.