The main reason for eye swelling and pain is elevated eye pressure, common causes are eye fatigue, eye inflammation, glaucoma, eye tumors, or secondary to some endocrine system diseases, etc. The specific treatment needs to be based on the cause, so if eye swelling and pain persist, it is recommended to seek medical treatment in a timely manner. 1, eye fatigue: in the case of long time eye reading, watching electronic products, etc., may cause eye swelling and pain This is especially true for patients with farsightedness and myopia. Therefore, daily attention should be paid to the length of eye use, and patients with myopia and hyperopia should first correct refractive errors, such as wearing corrective refractive glasses, etc., so as to relieve the symptoms; 2, eye inflammation: orbital cellulitis, acute iridocyclitis, lacrimal gland infection, keratitis, orbital pseudotumor, etc., due to infection, will mostly appear eye swelling and pain, photophobia, visual impairment, tearing, eye movement disorders, etc.. It needs to be treated with antibiotics, such as metronidazole, azithromycin, etc. If an abscess is formed, it may require incision and drainage for pus drainage; 3. Glaucoma: It manifests as severe eye swelling and pain, also accompanied by headache, nausea, etc., and vision loss and dark red petechial hemorrhage in the conjunctiva. Local pupil constrictors and beta-blockers are needed, and oral carbonic anhydrase inhibitors can also be used to reduce IOP. In severe cases, laser surgery can be considered for treatment; 4. Eye tumors: such as retinoblastoma and choroidal melanoma, in addition to long-term eye swelling and pain, patients will also experience persistent blurred vision, vision loss and protruding eyes. As the tumor is located in the eye, the treatment mainly adopts comprehensive treatment. If the impact on vision is small, you can choose laser and other methods of local excision; if the impact on vision is serious, eye removal surgery is needed if necessary; 5. Endocrine system diseases: For example, hyperthyroidism can cause eye swelling and pain, and also manifest as bilateral enlargement of the thyroid gland, emotional irritability, excessive sweating, insomnia and other symptoms. It can be treated with compound iodine solution, or beta-blockers such as metoprolol, propranolol, etc. If medication is ineffective, the condition needs to be treated by means of surgery if it is serious. In case of eye swelling and pain, patients are advised to rest with eyes closed and apply heat to help relieve the pain. If the swelling and pain is strong and lasts for a long time, or if other symptoms of discomfort appear, it is recommended to go to the hospital for a timely examination to identify the cause of the disease, so that targeted treatment can be carried out.