A Confirmed Scalp Nevus Sebaceous: What Changes Need Review?

If you have a confirmed nevus sebaceous on your scalp, arrange a dermatology review when a lump or sore appears within it. DermNet¹ says that a biopsy or removal may be needed to assess that change.¹

What does the diagnosis describe?

A nevus sebaceous is a birthmark most often found on the scalp. It contains overgrown skin structures, including hair follicles and sebaceous glands, and can appear as a hairless patch.¹

Ask the dermatologist to explain what established the diagnosis in your case. If you have an old report, bring it to the appointment. Include any details you remember about how the area looked before the current concern.

Why does a change need checking?

Many lesions remain unchanged, but another growth can develop within them. These secondary growths may be benign or malignant, so a new lump or sore needs clinical review.¹

Tell the clinician what you noticed and when. If you are unsure whether a change is new, say that. Ask whether examination is enough or whether a tissue sample is recommended, and how the result would affect the plan.

You could say: “This area has been present for years, but I have noticed this change. What do you need to check?”

What if I am considering removal?

DermNet¹ describes full-thickness surgical removal as an option, including for cosmetic reasons, with a scar expected. Superficial procedures such as shaving, dermabrasion or laser resurfacing are generally not recommended because they do not remove the entire lesion.¹

Ask which procedure is being proposed and why. Discuss the expected scar and what the result might mean for the way you wear your hair. If your main concern is appearance, explain that directly so the dermatologist can address it alongside the clinical findings.

You could ask: “What would removal change, what scar should I expect, and what are the alternatives in my case?”

What should the monitoring plan include?

Ask the dermatologist how the area should be followed, which changes to report and how to arrange a review if one occurs. Request the advice in writing, especially if you have been seen by several services over time.

If a biopsy or removal is planned, check how results will be communicated and who will explain them. Keep the report with the follow-up instructions. Before leaving, ask whom to contact if you have a new concern before the next appointment.

Hair, Everywhere includes a monthly Hair Log and visit script. Use the visit script to organize questions about the diagnosis, a new change or the proposed procedure, alongside your dermatologist’s advice. Explore the hair playbook.