Body Acne?

I wasn't sure if what I saw at my son's back is body acne. I brought him to the dermatologist and indeed it is. I'm now looking for a perfect acne body wash for him to use. I don't know if the body acne has something to do with the diet because the husband has it too. It's probably the heat that's causing it, or I don't know. I need the body wash pronto, it's not a sight to behold, plus they scratch all the time.