Skin infection or Myra’s

Patient: I had open heart surgery last January 30 th and since then I’ve had a few issues wit my skin such as rashes and pimples and the other day I developed big welt looking bumps on my legs and a huge one under my armpit I have been self medicating for jock itch so I went to my Dr today and he prescribed a cream for my jock itch and another one for what he said was mrsa could these be connected and could I have gotten the mrsa during my surgery

Symptoms: Rash and bumps on my skin

Images:
Skin infection or Myra's-1 Skin infection or Myra's-1

Doctor: