If a patient wakes up in the morning with double eyelids that have become single eyelids, it usually means that edema has occurred in the upper eyelids. The eyelids are more lax and prone to edema, so you need to avoid drinking too much water before going to bed and use a hot towel around your eyes to promote blood circulation around your eyes. At the same time, try not to overuse the eyes before bedtime to avoid the phenomenon of visual fatigue; 2, allergies can lead to this phenomenon, need to observe the eyelids have other symptoms, such as obvious redness, swelling, itching and other symptoms, it is recommended to use anti-allergic eye ointment treatment, eyelid pressure pain need to consider the inflammatory factors, the best in the ophthalmology timely consultation; 3, the patient is originally double eyelids, but due to skin aging, sagging, sagging, or due to orbital septum Fat prolapse can also lead to the disappearance of double eyelids; 4. If you have had double eyelid surgery and become single eyelids, it is usually due to the loosening of the thread knot after buried eyelid surgery or the loosening of sutures after incisional double eyelid surgery, which does not form effective adhesions and can be surgically repaired. Those with buried stitches can have incisional repair and remove the previous buried stitches at the same time. Those with skin laxity and fat detachment need to have skin and fat removal repair.