Skin Cancer Bumps on the Head: What to Know

Scalp and hairline bumps may come from folliculitis, heat rash, keratosis pilaris, lichen planus, or milia. A skin cancer lesion may be firm, shiny, rough, scaly, crusted, or slow to heal. Hair can hide a lesion, and repeated scratching may make it bleed, so someone else may need to help inspect the scalp.

A bump on the head is a possible presentation of skin cancer, but many head bumps are not cancerous. A clinician uses the history and examination, and may take a biopsy when the appearance is uncertain.

Part the hair in good light and photograph the area so you can compare it over time. Note whether the bump is new, enlarging, tender, itchy, bleeding, or repeatedly scabbing. Avoid picking, cutting, or applying home freezing products. Use gentle scalp care and protect exposed areas from sun. A dermatologist may inspect with magnification, feel the lesion, check nearby skin, and arrange biopsy or treatment. Cryotherapy is suitable only for selected diagnosed lesions; an antihistamine may relieve itch from some other causes.

Arrange a dermatology appointment for a scalp or hairline bump that persists, changes, repeatedly bleeds, forms a sore, or does not heal. Seek prompt review if it is near the eye or ear, becomes rapidly different, or is difficult to monitor because of dense hair. Get urgent help for uncontrolled bleeding, severe swelling, fever with spreading redness, or symptoms affecting vision or hearing.

Ask whether the bump needs dermoscopy or biopsy, whether hair follicles or surrounding skin are involved, and what treatment would preserve the area’s function and appearance. Confirm wound care, sun protection, follow-up timing, and which changes should be reported sooner.