Eyelids red and swollen for more than a month without swelling may be allergies, granuloma, keratitis, etc., the patient can follow the doctor’s instructions for targeted treatment, usually should pay attention to avoid contact with allergens, pay attention to eye hygiene and diet, etc., if it can not be relieved, it is recommended to go to the hospital in a timely manner for treatment. 1. Allergy: eyelids red and swollen and more than a month have not swollen, may be due to the patient to skin care products, cosmetics and other allergies caused by the patient can be used under the guidance of the doctor loratadine tablets and other anti-allergy drugs, usually pay attention to stay away from allergens, to alleviate the symptoms of discomfort. 2. Emphysema: patients with emphysema may have redness and swelling of the eyelids, if the inflammation is not controlled in a timely manner, the redness and swelling may not be able to reduce the swelling for a month, patients can use levofloxacin hydrochloride eye drops, erythromycin eye ointment and other medications under the guidance of a doctor, and pay attention to eye hygiene during the use of medication to avoid rubbing the eyes with your hands. 3. Keratitis: Keratitis is usually due to bacterial or viral invasion of the cornea, resulting in inflammation and infection caused by the patient can also appear in the eyes red and swollen, or even a month does not subside the swelling of the case, the patient can comply with the doctor’s instructions to use levofloxacin eye ointment, ganciclovir gel and other medications for treatment to control inflammation and promote the swelling to subside. It is recommended that patients with obvious redness and swelling of the eyelids consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.