Can You Have Dh As A Child, But Not As An Adult? in Dermatitis Herpetiformis Posted August 14, 2007 · Report to Admin I'm sure you can. My symptoms of DH have changed. When I was little, I used to get bumps like that on my elbows, knees, back, and forearms. I still occasionally get them on the forearms but it seems now that I only get it on my hands and in a sort of different form. Probably because the rest of my body is generally covered in some other form of hives or rash.