Also known as blepharitis, the eyelids are located on the surface of the eye and are susceptible to inflammatory reactions from microorganisms or from dust or chemicals. It is mainly caused by infection of the eyelid glands by staphylococci, especially Staphylococcus aureus. The inflammation is mainly located at the eyelid margin at the base of the eyelashes, while the inflammation is confined to the lid glands and can be characterized by redness, swelling, heat and pain. I. Common causes 1. Poor eye habits: There are more bacteria in the hands, and frequent rubbing of the eyes with the hands can lead to infection from bacteria entering the eyes. Long-term wearing contact lenses, poor local ventilation, bacteria are also easy to breed, leading to inflammation. Usually overuse of the eyes, the eye’s defense ability is reduced, bacteria are more likely to invade, and then cause wheals; 2, the impact of diet: consume too much high-fat food, the secretion of sebaceous glands, may cause the hair follicle blockage, secretions accumulate for a long time, bacteria breeding, resulting in wheals occur; 3, the impact of disease: such as diabetes and other patients, circulation is affected, easy to induce wheals or easy to recur. The first thing you should do is to apply heat to your eyelids for 10-15 minutes at a time, 3-4 times a day. This can promote blood circulation in the eyelids, relieve discomfort and promote inflammation; 2. Medication: antibiotic eye drops and eye ointment are needed to control the infection. In severe cases, drug sensitivity testing can be done to select appropriate antibiotics for systemic treatment. 3. Incision and drainage: Once an abscess has formed in a mydriasis, it should be incised and drained. The incision for an external mydriasis should be made on the skin surface at an incision parallel to the lid margin, in line with the eyelid skin texture, to minimize postoperative scarring. The incision for internal mydriasis should be made on the conjunctival surface of the lid at an incision perpendicular to the lid margin to avoid injury to the lid gland duct. It is important to note that it is not easy to incise when the wheals have not yet formed an abscess, much less squeeze to drain the pus, as this can lead to the spread of infection and serious complications. 4. Drainage: If the wheals are large, drainage strips should be placed to drain them.