Lymph node vx. infxn: There are lymph nodes in the armpits which can be felt as little lumps - sometimes we can feel them even if there is nothing wrong. Also possible to get ingrown hair, infected follicle or boil in the armpit if red/tender. If small, moves when you touch it, and no pain, it's fine to watch & wait, but if red, sore/painful or increasing in size, get checked by a doctor.
Answered 3/29/2020
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