I just had a lump removed from from my right arm pit and was diagnosed with MRSA. I had most previously been treating for hammer toe with considerable swelling and fluid in the joint. The bump under my arm was not on the surface but deeper under the skin. The Dr claimed after surgery that I had a hard shell around the abcess. I am recving iv antibiotic treatments for the next nine days. what should i be asking my dr tomorrow. biopsy results of the hard tissue surrounding lump has not yet been recieved