There is a large white skin on the scalp, consider the following two possibilities: 1, common psoriasis, in addition to the appearance of large white skin can also appear bundles of hair, and accompanied by erythema, scaly rash, itching sensation. In clinical treatment, you can apply topical carbotriol application, 2 times/day, and you can apply selenium disulfide lotion to wash your hair, 3 times/week. At the same time with the Chinese medicine medicine end wash hair, the main components are Turbinicarpus, alum, soapberry, Phellodendron, 2 times / day. 2, considered as hair red furuncle, can appear fine follicle consistency of the papule, accompanied by a large skin, clinical treatment can be oral compound glycyrrhizic acid capsule, external use of dinaide cream application treatment.