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.

Another possible cause is a swollen lymph node. Lymph nodes can enlarge when your body is fighting an infection, even something as simple as a cold, skin irritation, or a minor injury. These lumps may feel tender to the touch and can vary in size. In some cases, cysts or boils may also develop under the arm, creating painful, red, or swollen areas that may gradually grow over time.
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