Swollen eyes in the morning usually have the following causes: 1, drinking too much water: especially for patients with cardiac and renal insufficiency, drinking more water at night will also result in edema of the eyes; 2, kidney disease: especially seen in nephritis edema, patients with nephritis due to mildly reduced glomerular filtration rate, resulting in a small amount of water accumulation in the body, reaching from inside the blood vessels to outside the blood vessels and then to the lower parts of the body, but because the amount of water is not large, so in Clinically, lower limb edema is usually not seen. However, when the patient lies in bed, the water in the body will overcome gravity and reach the lax tissues of the body, and the most lax tissues are the face and eyelids, which will lead to the phenomenon of swollen eyes; 3. Allergy: including cosmetics and health care products allergy, cosmetic allergy patients, swollen eyes usually have a redder local color, and the local may be accompanied by itching and rash, which are points that can help identify.