What should you know about spots in armpits?

A single tender bump after shaving may be an irritated or ingrown hair. Several small red bumps around hairs can occur with folliculitis, while deeper painful lumps that recur in the folds need a clinician’s assessment. Deodorant, washing products, sweat, and rubbing can irritate the thin skin. A flat dark patch may follow inflammation or friction rather than being a pimple. The armpit is also a place where blocked pores can become uncomfortable because warmth and moisture are held against the skin.

Check whether the spots are on one side or both, linked to shaving or a new product, and associated with itch, pain, drainage, odour, or a spreading rash. Avoid assuming that every armpit bump has the same cause.

Pause shaving and fragranced deodorant until the skin calms. Clean gently, dry by patting, change out of sweaty clothing, and choose loose fabric that reduces rubbing. Do not squeeze bumps or share razors. If a product seems responsible, stop it and reintroduce products one at a time only after recovery. Persistent or recurrent lesions may need prescription treatment or a different hair-removal plan. Background reading is available on [Pimples](/symptoms/pimples/) and [Razor Bumps](/conditions/pseudofolliculitis-barbae/).

Seek prompt medical care if redness spreads, pain becomes strong, the area feels hot, pus collects, or you develop fever. Book an appointment for deep recurring lumps, scarring, restricted arm movement, or a spot that fails to improve after removing a suspected irritant. Rapidly changing colour or an unexplained ulcer also needs examination.

Does this look like folliculitis, an ingrown hair, acne, irritation, or another condition? Should I change my deodorant, shaving method, or cleanser? Is treatment needed for a recurring lump? What signs would mean I should return quickly?