Red, Itchy, Crusty Scalp Patches?

You have seborrheic dermatitis - dandruff. Ger a bottle of Denorex Theutic protection - this has coal tar that will eliminate the problem in 2-3 days. This stuff is too nasty to use regularly, so after using Denorex for a few days, switch to Selsun Blue for regular use during the winter.