What is Keratoacanthoma?

Keratoacanthoma is a common skin condition characterized by the rapid development of a round, firm, flesh-colored or reddish bump on the skin. It typically occurs on sun-exposed areas of the body, such as the face, arms, and legs, and is more common in adults.

Keratoacanthomas are usually benign (non-cancerous) and often resolve on their own within a few weeks to months. However, they can sometimes become infected or inflamed, requiring medical treatment.

Symptoms of keratoacanthoma

- Round, firm, flesh-colored or reddish bump on the skin

- Rapid growth (usually within a few weeks)

- Central crater filled with keratin (a protein found in the skin)

- Surrounding area of redness and inflammation

- Itching or tenderness

- Bleeding or crusting

Causes of keratoacanthoma

- Exact cause is unknown, but believed to be related to sun exposure, genetics, and immune system dysfunction

- May be triggered by trauma to the skin, such as a cut or burn

Treatment for keratoacanthoma

- Usually resolves on its own within a few weeks to months

- Treatment may be necessary if the keratoacanthoma is infected, inflamed, or causing significant discomfort

- Treatment options may include:

- Topical corticosteroids (creams or ointments)

- Intralesional injections (injections of medication into the keratoacanthoma)

- Surgical excision (removal of the keratoacanthoma)

- Curettage and electrodesiccation (scraping and burning of the keratoacanthoma)