Eyelid swelling after sleeping too much may be caused by physiological factors such as drinking too much water before going to bed, and may also be caused by pathologic factors such as blepharitis and eye allergies. 1. Physiological factors: If patients drink too much water before going to bed, use electronic products for a long time or lack of sleep, it may lead to eyelid edema. Because after sleep, the circulation and metabolism of the body is in a slow stage, when sleeping too much, the local circulation and metabolism is abnormal, resulting in part of the water gathering, thus causing eye edema. 2. Pathological factors: If the patient’s eye makeup is not removed cleanly or use expired eye cream and other cosmetics, the eyelids are infected by bacteria and other germs, causing blepharitis, which can lead to the patient’s eyes appearing red, swollen, painful and other uncomfortable symptoms. If the patient is allergic, sleeping in contact with hair and other allergens, causing an allergic reaction in the eye, the patient may experience eyelid swelling. It is recommended that patients with significant eyelid swelling should seek medical attention in a timely manner to assess their condition and follow the doctor’s instructions for treatment.