Waking up with swollen eyelids may be caused by drinking too much water before going to bed, bad habits, nephritic edema and other reasons. 1. Drinking too much water before going to bed: the body’s metabolism is slow at night, and if you drink too much water before going to bed, it may lead to water retention, and you will wake up with swollen eyelids. 2. Bad habits: prolonged exposure to electronic products, excessive intake of high salt and high fat food, excessive smoking and drinking, staying up all night and other bad habits can lead to eyelid swelling when you wake up. 3. Eye inflammation: If the eyelid is not clean, it may be infected with staphylococcus bacteria, causing blepharitis, redness, swelling, pain and discomfort. 4. nephritis: patients themselves suffer from nephritis, nephritis caused by glomerular filtration rate decreased, resulting in the accumulation of water in the body, the accumulation of water may be from the blood vessels outside the blood vessels, resulting in waking up eyelid swelling. Daily application of irritating skin care products, angioneurotic edema and other reasons may also lead to the emergence of eyelid swelling, if the eyelid swelling can not be relieved in a timely manner, you should consult a doctor for a definitive diagnosis, follow the doctor’s instructions for targeted treatment.