Red blood in the eyes, may be visual fatigue, eye infection, iridocyclitis, dry eye, eye trauma, etc., according to the cause of the appropriate drug treatment. 1. Visual fatigue: staying up late and over-exerting the eyes can cause visual fatigue, which can lead to redness in the eyes, you can use a cool towel to apply to the eyes, through the vascular contraction in the cold, which can make the redness subside; and at the same time, you need to ensure adequate sleep, so that the eyes can fully rest. In addition, you can use artificial tears, such as sodium vitrate, so that the tears moisturize the eyeballs, relieve eye fatigue, dry eyes and symptoms of redness. 2. Eye infections: such as bacterial conjunctivitis, blepharitis, keratitis, etc., usually caused by bacterial infection, viral infection and other factors, in the conjunctival surface of the conjunctival blood vessels congestion and dilation of conjunctival blood vessels with red blood, pain, foreign body sensation and other symptoms. Treatment should be directed at the cause of the disease. For example, use levofloxacin eye drops for bacterial infection, ganciclovir eye drops for viral infection, and miconazole eye drops for fungal infection. 3. Iridocyclitis: It is an autoimmune disease that presents with red eyes, congestion, eye pain, and vision loss. To be treated with glucocorticoid drugs such as tobramycin dexamethasone eye drops or eye ointment. 4. Dry eye: due to the patient’s long time looking at the electronic screen, eye fatigue will lead to tear evaporation too fast, the tear gland secretion is reduced, dry eyes, sleepy eyes, eye pain, reactive eye redness, vision instability. Artificial tears such as sodium vitrate eye drops can be used. 5. Eye trauma: Trauma can cause blood vessel congestion or rupture and bleeding in the conjunctiva, which can be seen as red bloodshot eyes and pain. If there is trauma, cold compresses can be applied at an early stage, and if accompanied by infection, anti-infective treatment such as levofloxacin eye drops can be given. The cause of red blood in the eyes is complex, and should be promptly consulted and treated under the guidance of a doctor.