Itchy scalp hair loss, consider is due to seborrheic dermatitis, ringworm, folliculitis and other factors. 1. seborrheic dermatitis: if you often eat greasy or high-fat food, it will lead to sebaceous gland secretion, so as to secrete a lot of oil, when infected by malassezia bacteria, will trigger seborrheic dermatitis, so that the patient appeared scalp itchy peeling symptoms, accompanied by the local appearance of oily dandruff. 2. Tinea capitis: if you don’t pay attention to scalp hygiene, it will lead to fungal infection, triggering the symptoms of itchy and flaky scalp, accompanied by dry hair, lack of luster, easy to break and other symptoms. 3. Folliculitis: Inflammatory reaction of hair follicles caused by damaged hair follicles infected with bacteria and other pathogens, if the symptoms are more serious, it will hurt the root of the hair follicles, resulting in hair loss, accompanied by itching, tingling and other symptoms. There are many reasons for itchy scalp and hair loss, patients need to go to the hospital in time for examination, after clarifying the cause of the disease, under the guidance of the doctor to give targeted treatment.