DH has always had dandruff but since getting chicken pox last year his scalp never seems to have recovered. It is constantly itchy around the crown and his scratching has left it red, sore and bumpy. And the hair is starting to become more sparse too. He uses Head & Shoulders which I have always wanted to incinerate as I think it's terrible stuff. Any suggestions? TGel? Nizoral? Philip Kingsley? TIA.