Redness and swelling of the outside of the eyes are mostly caused by local inflammation, and need to be treated according to the cause, which can easily lead to redness and swelling of the outside of the eyes, such as conjunctivitis, scleritis, keratitis, blepharitis and so on. 1. Conjunctivitis: there are infectious conjunctivitis and allergic conjunctivitis, for infectious conjunctivitis, first rinse the conjunctival sac, and then use topical antibacterial eye drops, such as chloramphenicol eye drops, neomycin eye drops, and tetracycline eye ointment before going to bed; allergic conjunctivitis, you need to use emastin drops to fight allergies, and systemic allergies can be orally administered benzydamine to fight allergies. 2. Scleritis: topical glucocorticosteroids should be used, and in severe cases, glucocorticosteroids should be injected under the conjunctiva, behind the globe or around the globe to prevent perforation; for patients who have already formed a perforation, allogeneic scleral transplantation is needed. 3. Keratitis: more secretions, can be rinsed with saline or boric acid solution, can use atropine to dilate the pupil to reduce the irritation of the sclera, choose effective topical eye drops for microorganisms, there are erythromycin eye drops, chloramphenicol eye drops, the application of glucocorticoids, the treatment of allergic keratitis and keratoconus stromalitis. 4. blepharitis: early local hot compresses to promote the absorption of redness and swelling, local use of antibiotic eye drops and eye ointment, the general use of broad-spectrum antibiotic eye drops, such as quinolone eye drops or ofloxacin eye drops. Redness and swelling outside the eyes, it is recommended to go to the hospital in time to avoid redness and swelling aggravated by the formation of ulcers and other serious damage.