Hi. I noticed a dime sized wide oval shaped cyst when I felt soreness under my left armpit. It moves around and hurts when I manipulate it. I was wearing an underwire bra that was rubbing on that spot due the edge popping out. I feel more comfortable without a bra on because of this
The local hygiene should be maintained as this sebaceous cyst or a folliculitis can spread in the near tissues!it could be some ectopic breast tissue there getting inflamed also!however, an FNAC test is necessary for confirmation and antibiotics locally or orally might be of help!all the best...........