What Is This Under My Armpit?

Have you recently noticed a strange bump, lump, or patch of skin under your armpit and wondered what it could be? The underarm area contains sweat glands, hair follicles, lymph nodes, and sensitive skin, making it common for various conditions to appear there. In many cases, small lumps are caused by ingrown hairs, clogged pores, or irritation from shaving and deodorants.