The normal care of the scalp should maintain the ecological balance of the scalp, ensuring that the scalp’s oil, pH and the homeostasis of the scalp’s microflora should be at a normal level, but the scalp has more sebaceous glands, more sweat glands, more hair and higher relative humidity, which can easily lead to seborrheic dermatitis of the scalp. Seborrheic dermatitis is a common dermatological disease, the simple use of ordinary shampoo will not solve the existing scalp disorders, it is recommended that patients with itchy scalp promptly to the hospital specialist, after a clear diagnosis can use shampoo containing selenium disulfide, ketoconazole and other ingredients for treatment.