What is an epidermoid cyst?
Olivia Hensley
Updated on March 21, 2026
Epidermoid (ep-ih-DUR-moid) cysts are noncancerous small bumps beneath the skin. They can appear anywhere on the skin, but are most common on the face, neck and trunk. Epidermoid cysts are slow growing and often painless, so they rarely cause problems or need treatment.
What is the cause of epidermoid cyst?
Most epidermoid cysts are caused when skin (epidermal) cells move under the skin surface, or are covered over by it instead of shedding. These cells continue to multiply, like skin does normally. They then form a wall around themselves (cyst) and secrete normal skin fluids (keratin).How do you get rid of an epidermoid cyst?
Treatment
- Injection. This treatment involves injecting the cyst with a medicine that reduces swelling and inflammation.
- Incision and drainage. With this method, your doctor makes a small cut in the cyst and gently squeezes out the contents. ...
- Minor surgery. Your doctor can remove the entire cyst.
What does an epidermoid cyst look like?
Epidermoid cystIt looks like a skin-colored, tan, or yellowish bump filled with thick material. It may become swollen, red, or painful if it's inflamed or infected.