What should you know about a sebaceous cyst near the groin?

An epidermoid cyst is a small sac under the skin containing keratin, a skin protein. It may feel round, firm, or slightly movable and can remain quiet for a long time. The groin is also an area where friction, sweating, shaving, and blocked follicles can irritate skin. A lump there is not automatically a cyst; possibilities include an abscess, an inflamed follicle, or a swollen lymph node. A clinician can examine its depth, surface, tenderness, and mobility. More information about common lumps is available in Skin Lumps.

Do not squeeze, pierce, or try to drain the lump yourself, especially in the groin where broken skin can become irritated. Keep the area clean and dry, choose loose clothing, and reduce rubbing until it is assessed. If the lump is calm but recurring or bothersome, a clinician may discuss Cyst Removal. An inflamed cyst may need a different approach, such as a Steroid Injection Into The Skin, while a collection of pus may require Abscess Drainage.

Arrange prompt medical assessment if the lump becomes rapidly larger, increasingly painful, hot, red, or starts draining. Seek urgent help for fever, feeling faint or very unwell, spreading redness, or severe pain. A new groin lump that persists, feels fixed, or is associated with unexplained weight loss or night sweats also deserves an examination. Do not rely on appearance alone to identify the cause.

Is this most consistent with an epidermoid cyst, an abscess, or a lymph node? Does it need treatment now or observation? If removal is considered, how would the cyst wall be handled to reduce recurrence? What changes should prompt an earlier review?