hello, welcome to healthcare magic yes your doctor is right that the development of the skin rash has no connection with prialt. though one of the side effect of the drug is getting purple spots on the skin meaning you are a developing a problem to clot your blood easily. your rash could just be a fungal infection it it is itchy in nature it could be a bruise that you might have gotten when you injured yourself. it could also be a start of a skin infection would suggest observe the skin for any other changes and at the same time you can get a blood check up done with inr to rule out that it is not a side effect of the drug you are been given. hope have helped to answer your query wish you a quick recovery. takecare.