What should you know about multiple cysts on scalp?

A pilar cyst forms beneath the scalp skin from a structure associated with a hair follicle. It may feel firm, round and mobile, and the overlying skin can look normal. Several cysts can occur in the same person, sometimes with a family tendency. A lump that is tender, warm, red or draining may be inflamed or infected instead. Not every scalp lump is a cyst, so examination matters when the diagnosis is uncertain.

Do not squeeze, pierce or repeatedly press the lumps; this can rupture the cyst and increase inflammation. Keep shampoo and hair products gentle if the scalp is irritated, and note each lump's location and changes. A clinician may simply monitor a quiet cyst. When a cyst catches on combs, is repeatedly inflamed or causes discomfort, [Cyst Removal](/treatments/surgical-dermatology/cyst-removal/) can remove the cyst wall and reduce the chance of that same lump returning.

Arrange prompt care for rapidly increasing size, marked pain, spreading redness, warmth, pus, fever or difficulty sleeping because of tenderness. Seek urgent help if swelling is accompanied by severe illness or if bleeding will not stop after pressure. A sudden change can reflect inflammation, rupture or another type of lump and should not be diagnosed from appearance alone.

Ask whether the lumps are consistent with pilar cysts, whether any is infected, and whether monitoring or removal is more suitable. Ask how an incision may affect hair in the area, how wounds will be cared for, and what symptoms should trigger a return visit.