 [ Symptoms ] stopped prednisone will i suffer withdrawal will i suffer adrenaline crisis [ Disease ] well that is kind of weird is not it i am sorry you are going through this the shoulder and arm area is an odd place to get a rash or a breakout of something like atopic dermatitis if the rash is happening only on one side it is probably worth having a health care provider look at it though it is probably not any sort of emergency if the rash is occurring on both shouldersarms then you might consider causes such as laundry detergent mild allergy or reaction dryer sheets wearing new clothes before washing them a change in the type of soap you use again possibly a mild allergic reaction or something along those lines if the rashblotchiness does not clear up on its own or if it gets worse spreads or your begin having swelling of the facemouth andor shortness of breath then you need to seek medical care best wishes as you try to solve this mystery