What should you know about a seb cyst on the scalp?

A pilar cyst, sometimes called a trichilemmal or sebaceous cyst, forms around a hair follicle. It often feels smooth, firm, and mobile beneath the skin, and the scalp is a common place to notice one. Some cysts remain quiet; others become tender after pressure, friction, or inflammation. A lump can resemble other skin conditions, so its appearance alone cannot confirm the diagnosis.

Avoid squeezing, puncturing, or trying to drain the lump at home, because this can irritate the skin and introduce infection. Arrange a dermatology assessment if it is growing, catching on a comb, or making hair care uncomfortable. If removal is chosen, a clinician can discuss a procedure that addresses the cyst and its capsule; simple drainage may not prevent it from returning.

Seek prompt medical review if the scalp becomes increasingly red, hot, swollen, or painful, or if fluid or pus appears. Fever, rapidly increasing swelling, or feeling unwell needs urgent assessment. A lump that bleeds, ulcerates, becomes fixed, or changes quickly also deserves examination rather than home treatment.

Ask whether the lump looks like a pilar cyst, whether observation is reasonable, and which removal method fits its size and location. You can also ask how to care for the scalp afterward and what changes should trigger a follow-up visit.