The formation of bags 1, the human body with age, the skin, subcutaneous tissue, muscle and its related structures degenerative changes in skin thinning, elasticity, relaxation and orbital diaphragm after the fat does not shrink but increase, and to the relaxation of the orbital diaphragm skin protrusion that presents bags change. 2, congenital genetic factors caused by the orbicularis oculi hypertrophy, the skin outside the wheel-shaped protrusion, especially in the smile is common. 3.Traumatic factors cause damage to orbicularis oculi and orbital diaphragm, and the fatty orbital fat will protrude with the weak skin subcutaneously. In addition, due to fatigue, poor sleep, excessive night life and systemic or chronic diseases are likely to induce or accelerate the appearance of bags under the eyes, and even present dark circles around the orbit. Due to the different reasons for the formation of under-eye bags, it also differs in the form of its performance: 1, simple orbicularis oculi hypertrophy type bags due to genetic factors, the lower eyelid bags at a young age. Its prominent feature is near the lower lid margin, continuous distribution in an arc shape, the skin is not loose, mostly seen in young people aged 20-32. 2, simple skin laxity type This is a case of lower lid and outer canthus skin laxity, but no orbital septum laxity, so no orbital fat protrusion, small wrinkles around the eyes, mostly seen in middle-aged people aged 33-45 years. 3. Mild to moderate bulging of the lower eyelid is mainly due to congenital overdevelopment of the orbital septum fat, mostly seen in middle-aged and young adults between the ages of 23-36. In severe cases, the canthal ligaments are relaxed, the lid plate is ectropion, the lid ball is separated, and tears often appear.