Redness of the whites of the eyes may be caused by chronic irritation, trauma, infection, elevated intraocular pressure and other factors. 1. Chronic irritation: For example, prolonged exposure to wind and sunlight or oil smoke can cause redness in the whites of the eyes, which may return to normal after eliminating the trigger. 2. Trauma: For example, eye trauma or the presence of a foreign body in the eye, resulting in local damage, will make the white of the eye red, may also be accompanied by pain, swelling and other symptoms. 3. Infection: For example, bacterial, viral, fungal infections such as keratitis, uveitis, orbital cellulitis, etc., cause eye irritation, which will lead to redness of the white of the eye, accompanied by symptoms such as itching, tearing, and burning sensation. 4. Elevated intraocular pressure: for example, acute angle-closure glaucoma, orbital space-occupying lesions, etc., may lead to increased intraocular or intraorbital pressure, resulting in impaired blood circulation and localized stagnation, which may lead to redness of the white of the eye. Redness of the white of the eye and other abnormal manifestations, it is recommended to go to the ophthalmology department of the hospital for examination and treatment in time to avoid delaying the condition.