For the diagnosis of geriatric pruritus. Geriatric pruritus is generally a condition in which the skin of the elderly develops intractable pruritus without dry skin or other internal or external factors, such as thinning of the skin caused by reduced sebum secretion function or reduced sebum, which then causes dryness and pruritus. There is also irritative itching that occurs when the spleen becomes poorly functioning, and there are cases related to age-related internal organ diseases, such as diabetes, tumors or liver and gallbladder diseases, constipation, and age-related jaundice that can also cause itching. Also elderly people may have bad habits, smoking, alcohol, spicy food can also cause itching. Geriatric pruritus is a combination of factors, usually without a rash, mainly itching.