How common is a non-healing sore in keratoacanthoma?

Keratoacanthoma can develop as a firm, rapidly enlarging bump with a central plug or open sore. The surface may crust or bleed, and the area can feel tender. It commonly appears on sun-exposed skin, although only an examination can determine what a particular lesion represents.

A non-healing sore is a common way Keratoacanthoma presents, but the symptom is not a diagnosis by itself. Similar lesions may reflect other skin cancers, irritated growths, infection, or trauma, so visual resemblance should not be used to self-diagnose.

Arrange a prompt dermatology assessment for a sore or bump that is enlarging, crusting, or failing to close. The clinician may recommend a biopsy to distinguish keratoacanthoma from other lesions and guide treatment. Keep the area clean, cover it if it rubs against clothing, and do not squeeze or cut it.

Take a dated photograph only to help describe change; it should not replace an examination. Mention any earlier lesion at the same site and whether it has bled or become painful.

Seek prompt medical attention for fast enlargement, persistent bleeding, severe tenderness, pus, spreading redness, or a lesion near the eye, mouth, or nose. Earlier review is also sensible when the area interferes with eating, seeing, movement, or clothing.

Ask whether the lesion needs biopsy, what other conditions can resemble it, and how quickly it should be treated. Ask how to protect the site while waiting and which changes should trigger an earlier call.