Had Carcinoma On My Left Ear That WS SUCCESSFULY TREATED

had carcinoma on my left ear that wS SUCCESSFULY TREATED for 6 weeks at the Texas Oncology. Now I have a dark purple coloring on my left forearm close to my elbow. I have been treating it with a sulfa ointment from a tube but now other spots have appeared as in a stairway one after the other. One of the spots has a hole in the middlethat seems to have a YYYY@YYYY other exposed places. whats your diagnostic?