Red eyes after swimming may be caused by water entering the eyes, infection and other reasons, which can be treated by physical therapy, medication and general treatment. 1. Water in the eyes: During swimming, water may enter the eyes and cause irritation to the eyes causing redness, which usually does not require special treatment and can be recovered after a period of time. During this period, the patient can promote the normalization of the eyes through appropriate hot compresses and massage. 2. Infection: Red eyes after swimming may also be caused by bacterial infection induced by unclean water in the swimming pool. It is recommended that patients refer to the instructions for the use of antibiotic drugs such as roxithromycin eye drops, which can help to play a bactericidal effect. If the patient is accompanied by the appearance of white eye mucus and tearing and other symptoms, mostly due to the decline in body resistance caused by the patient should be appropriate to adjust the diet, avoid swimming for a short period of time, to prevent aggravation of the eye irritation. Patients with red eyes after swimming should go to the hospital and choose the appropriate method to treat the disease.