Hidradenitis suppurative: what disease is this?

Sweatgland infection: Hidradenitis is smoldering infection of sweat glands of axilla (armpits). A likely cause is excessive sweating and or abrasion of region; perhaps by wearing equipment with under-the-shoulder bands. In women the problem sometimes accompanies shaving axillary hairs; especially when undertaken with a previously used razor. Bacteria are ever present interlopers; awaiting irritated surfaces to invade.

Hidradenitis: Hidradenitis suppurativa (hi-drad-uh-NIE-tis sup-yoo-ruh-TIE-vuh) is rare, long-term skin condition that features small, painful lumps under the skin. They typically develop where the skin rubs together, such as the armpits, the groin, between the buttocks and under the breasts http://www.mayoclinic.org/diseases-conditions/hidradenitis-suppurativa/home/ovc-20200012