There are various reasons that cause patients to have swollen bags under one eye, first of all, it may be a normal physiological phenomenon, often occurring in the elderly population, with age, the superficial skin, subcutaneous tissue, muscles, etc. will experience functional decline, so the skin around the patient’s eyes has a thinning, reduced elasticity and sagging in appearance, resulting in swollen bags. In addition, it may also be caused by irregular life, mosquito bites, environmental stimulation, trauma, allergies, lid gland cysts, blepharitis, conjunctivitis, etc.: 1. Irregular life: overwork, lack of sleep, and long-term late night will accelerate changes in the skin around the eyes, triggering swollen bags and dark circles, patients need to adjust their work and rest in a timely manner and develop good habits, thus promoting the elimination of symptoms; 2. Mosquito bites: If the patient’s lower eye bags appear swollen performance, and accompanied by redness, heat, itching and other discomfort, consider that it may be due to mosquito bites, leaving behind inflammatory media in the eye. This condition can generally be relieved by itself, such as itching discomfort, can be properly iced to relieve. However, if it does not subside for several days, it is recommended to seek medical advice and take relevant antihistamines such as loratadine and cetirizine as prescribed by the doctor; 3. Environmental stimulation: In the case of more sun exposure, ultraviolet rays will stimulate the skin of the eyes and accelerate the formation of eye bags with swelling. Usually, patients pay attention to applying sunscreen, wearing hats and umbrellas after going out, all of which can effectively relieve the symptoms; 4, trauma: the patient’s eye bags area had been bruised, hit by hard objects, falls, extrusion and other traumatic injuries, there may be no obvious swelling at that time, with the untimely treatment, it may cause subcutaneous tissue congestion and edema. If the injury is mild, a local cold compress can be applied and a hot compress after 24 hours to relieve the swelling of the eye bags. If the degree of injury is more serious, patients should promptly go to the hospital to deal with the wound, as well as follow medical advice oral antibiotics, blood circulation and other drug therapy; 5, allergy: patients themselves are sensitive, in contact with pollen, dust mites, chemical substances, animal hair and other allergens, easy to induce allergic reactions, so the periocular, nasal, throat and other parts of the swelling, itching and other discomfort can occur. Patients should first be removed from the allergen, the symptoms will then be relieved, if necessary, antihistamines can also be applied to anti-allergy treatment; 6, lid gland cyst: patients with round lumps in the eye area, accompanied by slight clinical redness, swelling, tenderness and other manifestations, if not timely intervention, may induce wheals. In the early stage, appropriate hot compresses can be applied to relieve, if the symptoms worsen, patients need to seek medical attention in a timely manner, using local injections of glucocorticoids to fight infection, and if necessary, surgery is required to eradicate the lesion; 7, blepharitis: also commonly known as wheals, patients will not only appear swollen lower eye bags, but also accompanied by pain, redness, increased skin temperature and other adverse symptoms. Treatment patients should follow the doctor’s instructions to use topical levofloxacin eye drops, erythromycin eye ointment and other anti-inflammatory and anti-swelling. Some patients with serious abscesses should also undergo surgery; 8, conjunctivitis: patients often have vasodilated exudate in the eye, which can induce edema around the eye, which in turn causes swelling of the patient’s lower eye bags, the main clinical treatment is based on the specific cause of the patient. When conjunctivitis causes more serious endophthalmitis, corneal ulcers and other conditions, surgical intervention by a professional doctor is required.