My son has a rash that started on his elbows, wrists, spread to legs and ankle areas, red dots, blotchy, and is very itchy. He also had a blepharitis diagnosed on one eyelid that just will not clear up - puffy and itchy also. Could this be scabies? Both respond to steroids (eyedrops, ointment for body) but do not clear them. Thank you for any insight!