What should you know about little lumps under skin?

A soft or firm, mobile lump may be a benign skin or fatty growth, while a tender red lump can occur with [Boils](/conditions/boils/). A cyst may have a smooth outline or a small surface opening. Less commonly, a persistent or changing skin nodule needs assessment for conditions such as [Basal Cell Carcinoma](/conditions/basal-cell-carcinoma/). These examples describe possibilities; the lump itself does not reveal its diagnosis.

Record when you first noticed it, whether it moves under the skin, and any changes in size, colour, pain, bleeding or drainage. Avoid squeezing or repeatedly checking it, because pressure can inflame the area and make its features harder to assess.

Keep the skin clean, protect it from rubbing and take a clear photograph beside a familiar object so changes are easier to notice. Do not cut into or drain the lump at home. If inflammation is confirmed, a clinician may consider a [Steroid Injection Into The Skin](/treatments/injectables/intralesional-steroid-injection/), but treatment depends on the examination and the underlying cause.

Book a medical review for any unexplained lump that persists, enlarges, becomes fixed, changes its surface or returns after settling. Seek prompt care for severe pain, rapidly spreading redness, pus, fever, heavy bleeding or swelling near the eye or airway. A sore that does not heal also warrants direct assessment.

Ask what features suggest a cyst, boil or another growth, whether the lump needs imaging or removal, and what changes should bring you back sooner. Ask whether squeezing, massage or home creams could make it worse.