What should you know about a lump under the skin with pus?

Pus is a thick fluid made of immune cells, damaged tissue, and germs. A tender, warm lump that develops a central pocket can fit a boil, which begins around an inflamed hair follicle. A cyst can also become inflamed or infected. A clinician may need to feel the area and check whether drainage, a swab, or medicine is appropriate. A skin lump has many possible causes; its appearance alone cannot identify the cause. Basal Cell Carcinoma is usually assessed differently from a pus-filled boil, but a lump that repeatedly crusts, bleeds, or fails to heal still deserves examination.

Keep the area clean and cover it loosely with a fresh dressing if it is draining. Wash your hands before and after touching the skin, and do not share towels or razors. A warm, clean compress may ease discomfort and encourage natural drainage. Do not pierce, cut, or press the lump; this can push infection deeper and spread germs. A healthcare professional can explain whether a procedure or an intralesional steroid injection is suitable for a particular non-infected inflammatory lump.

Seek prompt medical care if redness is expanding, pain is increasing, the skin feels hot, or you feel feverish or unwell. Get urgent help for a lump near the eye, nose, or spine, or if red streaks extend from it. Arrange a routine review when the lump keeps returning, remains firm after the pus has gone, or does not begin improving. People with diabetes, reduced immunity, or medicines that suppress immunity should seek advice early.

Ask whether this looks like a boil, cyst, or another type of skin lump; whether it needs drainage; how to dress the area; and which changes should trigger urgent review.