There are various causes of itchy scalp in the elderly, including physiological factors, mental factors and disease factors. Usually, there is no great impact on health. If the scalp itch is caused by disease factors, it is recommended that patients go to the hospital for medical consultation and treatment after clarifying the cause. First, physiological factors: 1, improper cleaning: some elderly people due to the growth of age, the mobility of the limbs decreased, the number of times to clean the hair reduced, resulting in the accumulation of scalp dirt, resulting in itchy scalp. In addition, there may be improper selection of shampoo products, resulting in failure to achieve the cleaning effect and scalp itching; 2, physical function decline: the elderly gradually decline in physical function, the ability to maintain skin moisture is also reduced, there may be local itchy scalp. Second, mental factors: the spirit of long-term tension will lead to enhanced oil secretion of the scalp, which may appear itchy scalp. Third, disease factors: 1, dry skin disease: the elderly due to a decline in metabolic function, resulting in dry skin disease, thus appearing itchy scalp symptoms. The itchy symptoms will intensify when the weather changes from hot to cold; 2. Fungal infection: such as ringworm, which causes itchy scalp symptoms. It is recommended to go to the hospital for fungal examination and treatment under the guidance of a professional doctor; 3, seborrheic dermatitis: if the elderly have itchy scalp at the same time, accompanied by red spots, flaking and other manifestations, seborrheic dermatitis is considered and needs to be treated in the hospital; 4, internal organ diseases: such as abnormal heart, liver and kidney functions, resulting in internal dampness and heat, excretion of metabolic waste and imbalance of acid-base balance, etc., patients will have complications such as itchy scalp symptoms.