Recently, I have had a lot of acne on my body. The face acne seems manageable by cleansing and mild diy treatments. But the back acne has spread all over my back, lower waist, stomach and upper arms as tiny bumps. It gets itchy, inflamed and crusty a lot. I have oily face and scalp but dry skin everywhere else. I also have a history of urticaria from stress and some sulpha drugs, so I have tried mostly mild diy treatments. But nothing is working. Please suggest something to get rid of the acne on my back and other parts.