Hello, I am a IV heroin user. I recently missed a shot in my left forearm,I may have hit an artery,Im actually sure if it because I did register blood but it burnt severely as I injected,disregard WHY I continued to inject despite the spreading burning pain because I cannot answer that myself. So,the area remained tender and looking very bruised,as days have gone by it has become more tender and painful and what looks like a very dark bruise is not getting better..and it is becoming very itchy..but very painful to the touch. I assumed I somewhat burned the surrounding tissue with the acidic heroin (black tar) but it doesn t seem to be gettinf any better and it seems as if the skin above the bruise is becoming,well,idk how to explain.its becoming raw i guess you could say. Have I burnt myself from the inside out? Or have I developed something that is rotting or eating my tissue from the inside? It isn t very swollen and doesn t seem to be abcess like..this is different..please help me understand if I am in serious need of medical attention. Thank you.