Ectropion is a perverse condition in which the lid margin leaves the eye and flips outward. In mild cases, the lid margin leaves the eye, and in severe cases, the lid conjunctiva is exposed, or even the eyelid is completely ectropioned. What is the daily prevention of bilateral lid ectropion? 1. Scarring lid ectropion: contraction of the skin surface of the eyelid due to scarring. Lid skin scarring can be caused by trauma, burns, chemical injuries, eyelid ulcers, lid margin osteomyelitis, or facial surgery. Geriatric lid ectropion is limited to the lower lid. This is caused by the weakening of the orbicularis oculi muscle and the loosening of the eyelid skin and canthal ligaments in the elderly, which prevents the eyelid from being held to the eyeball alone and causes it to drop due to the weight of the lower lid. 2. Paralytic lid ectropion: This is also limited to the lower lid. This occurs when the facial nerve is paralyzed and the orbicularis oculi muscle loses its contraction function and the weight of the lower lid causes it to fall. Generally, when performing corrective eye surgery for prevention, the orbital septum is first strengthened, the orbicularis oculi muscle is tightened, and finally the excess skin is removed. However, some surgeons mistakenly consider the correction of under-eye bags as the tightening of the skin and ignore the tightening of the orbital septum and orbicularis oculi muscle. If the amount of skin removal is appropriate, but the orbital septum and orbicularis muscle are not treated, the bags will recur quickly. If too much skin is removed, the lower lid will become ectropion. In recent years, many scholars have agreed that the strengthening of the orbital septum and the tightening of the orbicularis oris muscle are more important than skin removal for the corrective surgery effect of under-eye bags.