Lower eyelid ptosis is very common in everyday life, can occur at all ages and can be caused by a variety of factors, such as congenital developmental factors, eye trauma, inflammation, increased orbital fat and lower lid ectropion. Treatment varies depending on the cause, but ultimately surgery may be an option. If the drooping lower eyelid is caused by orbital fat, which is referred to as bag formation, orbital lipectomy is performed to correct it; if the drooping lower eyelid is caused by lower lid ectropion, lower lid ectropion correction is performed. Lower eyelid ptosis is also common in the elderly and is caused by skin laxity. The treatment of this condition depends on the degree of laxity; if the laxity is mild, temporary observation may be chosen, and if the appearance is affected, surgical excision of excess skin may be performed to correct the problem. If the lower eyelid sagging is caused by congenital development, the specific treatment measures need to depend on the age, if the age is small, in the growth and development period, temporarily can not be dealt with, to be stable before processing. In summary, the treatment of lower eyelid sagging needs to be considered according to age, the degree of laxity, etc. Those with a lighter degree of sagging can be temporarily observed, while those with a heavier degree of sagging can choose surgical treatment.