Epidermal Inclusion Cyst

What it is

An epidermal inclusion cyst is a small, harmless bump that forms just underneath your skin. It happens when skin cells, which normally shed off the surface, get trapped deeper and multiply. The cyst is filled with keratin, a normal protein found in your skin, hair, and nails.

How common it is

These cysts are very common and can happen to anyone at any age. It is one of the most common types of cysts found on the skin.

What you may notice

You may feel a small, round, and firm lump just below the surface of your skin, which can sometimes have a tiny dark spot in the center. The cyst is usually not painful unless it gets irritated or infected, which can cause redness and soreness.

What can contribute

These cysts can sometimes form after an injury to the skin, like a cut or scrape, or in areas with a history of acne. For many people, they appear without any clear reason.

How it is usually checked

Your provider can usually identify this type of cyst with a physical exam by feeling the lump and looking at the skin over it. Unless the cyst is bothering you, your provider may suggest simply keeping an eye on it for any changes.

Does this change my long-term risk?

Having an epidermal inclusion cyst is very common and harmless. It does not change your long-term breast health risk.

Comfort and everyday care

• Try to avoid squeezing or picking at the cyst, as this can cause irritation or lead to an infection.
• Some women find that applying a warm, moist cloth to the area can help soothe it if it feels tender.
• Keeping your skin clean with gentle washing can be helpful.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.