I have a scaly itchy head?

Seborrheic Dermatiti. Most likely you have seborrheic dermatitis. This is ususally treated with tar shampoos or shampoos with antifungal properties. Otc blue selsun type shampoos help this. Denorex type shampoos help. Sometimes steroid foams may be needed in difficult cases. If severe or can't control, see your pcp for a prescription formulaiton or see dermatologist. Don't be a flake, get treated!