i have been told by my doctor that i have seborrhetic(sp) dermatitis. From the description here, i don't think that is the case. I get cystic bumps/pimples on my scalp. occ itchy, but mostly not. I have tried dandruff ,tar and sicyclic acid(sp) shampoos and an ointment from dermatologist. gets better and come back. i have type 2 diabetes. uncontrolled at this time.is there something else that i can do? can i prevent it from happening?