Why do I have sores under my armpits?
Why do I have sores under my armpits? Hidradenitis suppurativa (hi-drad-uh-NIE-tis sup-yoo-ruh-TIE-vuh) is a condition that causes small, painful lumps to form under the skin. The lumps usually develop in areas where your skin rubs together, such as the armpits, groin, buttocks and breasts. What causes boils in the armpit area? What causes armpit boils?
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