A chronic skin condition featuring lumps in places such as the armpits or groin.

Hidradenitis suppurativa is a chronic skin condition featuring pea- to marble-sized lumps under the skin.

It often occurs where skin rubs together, such as in the armpits, groin, and buttocks. Lumps can be painful and tend to enlarge and drain pus.

Medicines, corticosteroid injections, and sometimes surgery can help ease symptoms.