Can recurring painful bumps in the armpits, groin, thighs, or under the breasts be more than acne or boils? Hidradenitis suppurativa, often called HS, is a long-term inflammatory skin condition that can cause tender lumps, swelling, drainage, scarring, and discomfort in areas where skin rubs together. HS is not caused by poor hygiene, and it is not contagious. Still, it…