If there is unilateral eyelid swelling when you get up in the morning, there are generally two possibilities, one is inflammatory edema and the other is simple edema. Inflammatory swelling with eyelid pain or increased secretion, accompanied by redness and swelling sensation, is generally considered to be caused by bacterial infection or viral infection. If the eyelid swelling is not accompanied by redness or increased secretion, it is simple eyelid edema. There are two possibilities for edema: idiopathic edema without any cause, and water and salt metabolism problems, which are caused by excessive water accumulation under the eyelids when waking up in the morning.