Patients wake up with swelling of the lower eyelid, can be seen in normal people, but also may be blepharitis, allergic dermatitis and other pathologic factors caused by the patient, you should consult a doctor in a timely manner to clarify the cause of the disease after treatment. 1. Physiological conditions: normal people can have swollen eyes when they drink a lot of water before going to bed, sleep in a bad position, or stay up all night. This kind of people should develop good habits, avoid staying up all night, and generally do not need special treatment. 2. Blepharitis: Blepharitis is a suppurative inflammation of the eyelid glands caused by infection with Staphylococcus aureus and other pathogens, and the patient’s eyelids may become swollen with pus, and the patient may experience localized pain, redness, and oozing of fluid. 3. Allergic dermatitis: if allergic patients in contact with pollen, animal hair, etc., caused by allergic dermatitis, patients can appear eyelid swelling, patients will also appear eyelid swelling with localized rash, itching, allergy is serious when there will be tightness of the chest, dyspnea and other symptoms. It is recommended that patients with significant swelling of the eyes should consult a doctor to assess their condition and follow the doctor’s instructions for treatment.