Have had an underarm lump before which went on its own, doctor said it was a cyst. I've recently had another one which doctor said is probably infection and prescribed an antibiotic, then said he thought that there seemed some excess breast tissue actually in the breast and said just to put my mind at rest he'd send me to breast clinic, this is about 2 weeks away. Bit worried, wondering if he thought the excess breast tissue was a sign something's wrong. Please can anyone put my mind at rest and tell me this is common?