Red blood in the eyes may be caused by visual fatigue, inflammation, glaucoma, etc., you can use anti-fatigue eye drops, antibiotic eye drops, lower intraocular pressure treatment to relieve. 1. Visual fatigue: staying up late or overuse of the eyes will appear red blood, you can consider some anti-fatigue eye drops, such as seven leaves of digitalis bisabololol eye drops, naphthamivir eye drops, etc. for treatment. Daily life is recommended to pay attention to develop good eye habits, pay attention to rest both eyes, and ensure sleep. 2. Inflammation: If there is redness in the eyes with an increase in abnormal secretions, it may be due to local infections, such as conjunctivitis, keratitis and so on. You need to give antibiotic eye drops for treatment, such as levofloxacin hydrochloride eye drops, tobramycin eye drops and so on. 3. Glaucoma: red blood in the eyes may be the manifestation of acute attacks of glaucoma, due to elevated intraocular pressure caused by the conjunctiva mixed congestion. In this case, you need to give the treatment of lowering intraocular pressure, often used drugs mainly include carteolol hydrochloride eye drops, brinzolamide eye drops and so on. When there is red blood in the eyes, it is recommended that patients go to the ophthalmology department in time for consultation, to clarify the cause of the disease, and use medication under the guidance of the doctor, so as not to cause adverse consequences .