What causes red spots on leg after an injury to patella?
Patient: I fell on my knee and injured my patella 2 mos ago...after that I developed red spots on the same leg and also what looked like a prickly heat rash. The rash spread to my upper chest and neck. Treated with Prednisone. Now I still have the rash on my upper legs, still itchy. What could this be? Doctor: Hi,  It could be a pertachiae and does not require any treatment. If lesion persist better to consult an orthopaedician and get evaluated.  Hope I have answered your query. Let me know if I can assist you further.  Regards, Dr. Shinas Hussain, General & Family Physician