Without : Without examining you, it's difficult to say exactly what it is. There are many common things that a hard, red lump in the armpit skin could be such as: - inflammed lymph node - ingrown hair - sebaceous cyst - abscess or boil (infection) - folliculitis (infection of the hair follicle) if it is painful, enlarging, or if you are suddenly noticing more, give your doctor a call. You should start with your pcp first since they treat a wide variety of problems and you are more likely to be able to see them sooner than a gynecologist or dermatologist. Odds are, they'll be able to treat you. If they think you should see a specialist, they'll let you know.
Answered 10/3/2016
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