Red blood in the eyes should first be clarified as to the cause, so it is recommended to go to the hospital for routine ophthalmology examination in the following cases: 1. If the patient has red blood mainly near the periphery of the eyes, and accompanied by varying degrees of increased secretions, it is usually considered to be caused by conjunctivitis, such as bacterial conjunctivitis, which needs to be treated with antibiotic eye drops such as oxyfloxacin eye drops; 2. If it is viral conjunctivitis, it needs to be treated with acyclovir If the patient also has a foreign body sensation, foreign body residues need to be excluded, such as conjunctival sac foreign bodies need to be removed in a timely manner, followed by conjunctival sac irrigation, corneal foreign bodies need to be spotted with surface anesthetic eye drops, corneal foreign body removal, and then further anti-inflammatory treatment; 4, if the increase in red blood after eye fatigue, usually consider visual fatigue or dry eye. It is recommended to order artificial tears type eye drops to treat.