Sagging and loose skin may be caused by physiological factors, the need to develop good habits, if necessary, medical treatment; may be caused by skin laxity, the need for surgical plastic surgery. 1. Physiological factors: ageing will lead to a decrease in the synthesis of elastin and an increase in the loss of elastic fiber protein, which may lead to sagging and loose skin. Patients do not need to be overly nervous, it is recommended to go to bed early and get up early, avoid staying up late, eat a balanced diet, ensure adequate nutrition, participate in appropriate physical exercise, if necessary, hyaluronic acid injection, facelift surgery and other medical treatment. 2. Skin laxity: may be related to genetic factors, patients will appear skin inelasticity, sagging, skin wrinkles, premature aging and other symptoms, there is no effective treatment, the serious can be improved through surgical plastic surgery to improve the state of skin laxity, but can not prevent the recurrence of skin laxity, more need to repeat the operation. It is recommended that patients with sagging and loose skin should consult a doctor in time to clarify the cause of the disease and then treat the symptoms, and avoid using medication privately to avoid delaying the condition.