Redness of the white eyeball, i.e., conjunctival congestion, is shown below: There are various causes of redness of the white eyeball (conjunctival congestion), the common ones are: (1) inflammation of the eye: such as conjunctivitis, keratitis, acute iridocyclitis, endophthalmitis, sclerositis, blepharitis, acute lacrimal glanditis, etc.; (2) acute episodes of acute angle-closure glaucoma; (3) dry eye disease; (4) after eye surgery; in addition, eye trauma caused by Inflammation, foreign body, eye tissue damage, etc., abnormal eyelid position, wearing contact lenses, lack of sleep, staying up late, after drinking, after bathing, etc., can also cause conjunctival congestion. Therefore, if you have conjunctival congestion, it is important to go to the hospital in time to check and confirm the diagnosis so as not to delay the treatment.