Itching in the elderly may be caused by seasonal factors, geriatric pruritus or diabetes mellitus. 1. Seasonal factors: low humidity in the air in winter reduces sweat secretion, which aggravates skin dryness, thus causing body itching. 2. Geriatric pruritus: usually due to the increase in age, the elderly skin atrophy, degeneration, will lead to sebaceous glands, sweat glands atrophy, the secretion of the function of the consequent decline, caused by the skin surface of the reduction of lipid emulsion, resulting in geriatric pruritus, triggered by the itching of the body. 3. Diabetes: the elderly suffering from diabetes, blood sugar metabolism abnormalities easily lead to skin dysfunction, thus causing the body itchy situation. Caused by the elderly body itching, there may be other factors, should be timely to the hospital, clear reasons to give targeted treatment. Daily moisturizing work should be done to avoid excessive scratching, resulting in skin damage.