Itchy scalp in the elderly may be a symptom caused by physiological factors such as improper cleansing and decline in body functions, or it may be a symptom caused by diseases such as ringworm of the head and seborrheic dermatitis. Itchy scalp elderly patients should go to the hospital in time to identify the cause of the disease. 1. Physiological factors: some of the elderly limbs of the decline in mobility, the number of times to clean the hair, easy to lead to the accumulation of scalp dirt, thus causing scalp itching. In addition, with the decline in the physical function of the elderly, the ability to maintain skin moisture has also been reduced, and thus the symptoms of scalp itching. 2. Tinea capitis: Tinea capitis is a common skin disease caused by ringworm bacteria infecting the hair and scalp. Ringworm of the scalp can appear in the scalp hair loss spots and accompanied by scales. At the same time, it can be accompanied by different degrees of itching. 3. Seborrheic dermatitis: Seborrheic dermatitis is a chronic inflammatory skin disease that occurs in the overflow area of the skin and may be related to Malassezia infection. It can occur in areas with high sebum secretion, such as the scalp and face. Patients may present with lesions such as erythema and greasy flakiness, accompanied by itching. Elderly patients with itchy scalp should go to the hospital in time if they exclude the influence of physiological factors, and under the guidance of the doctor for regular treatment.