Redness of the outer corner of the eye more than 20 days after retinal detachment surgery can be recovered by clinical observation and medication. Subconjunctival hemorrhage occurs in the outer corner of the eye, manifested as redness of the outer corner of the eye, clinical observation can be considered when the bleeding is small, and most of it can be absorbed by itself. If the bleeding is more, it is recommended to take oral medication to activate blood circulation and eliminate blood stasis, such as Yunnan Baiyao capsule, which can promote the absorption of bleeding. Redness at the outer corner of the eye, manifested as redness at the outer corner of the eye, requires topical eye drops and timely treatment, including levofloxacin eye drops and other antibiotic eye drops, or dianbisu eye drops, pranoprofen eye drops and so on. It is recommended that the patient should have a timely review and follow the doctor’s instructions.