Swelling under the eyes outside may be caused by physiological reasons, but also may be due to pathological reasons such as granuloma, allergies and so on. 1. Physiological reasons: drinking too much water before going to bed, staying up late and not getting enough rest can lead to swollen eyes after waking up, which can generally be relieved on its own, and at the same time pay attention to a regular work and rest schedule, ensure adequate sleep, and avoid drinking too much water before going to bed. 2. Eyelid swelling: Inflammation of the lower eyelid blepharoplasty gland by bacteria and other pathogens, the internal secretion can not be discharged in time to cause swelling, small granuloma can be hot compresses to promote the subsidence, if the lumps are large and there is obvious pain, you can be surgically incised to the internal pus release, and then use drugs such as levofloxacin treatment. 3. Allergy: contact with pollen, cosmetics and other allergies, can also occur around the eyes of the swelling, but also accompanied by itching symptoms, this situation needs to stay away from allergens, if necessary, also need to carry out anti-allergy treatment. Swelling under the eyes outside the situation, by rest can not be relieved, it is recommended that patients seek medical examination and treatment, medication, do not self-medication.