Subconjunctival hemorrhage may be caused by overuse of eyes, conjunctivitis, thrombocytopenic purpura and other diseases, which need to be treated according to the cause. 1. Excessive use of the eyes: prolonged use of the eyes, the eyes can not get rest to produce eye itching, foreign body sensation and other symptoms of visual fatigue, can not help but rub the eyes with the hand, may cause subconjunctival hemorrhage. This situation should be reasonable use of the eyes, hemorrhage can generally be absorbed by themselves. 2. Conjunctivitis: common symptoms include subconjunctival hemorrhage, pain, dryness, etc. If it is viral conjunctivitis, you need to follow the doctor’s instructions to apply acyclovir eye drops, ganciclovir eye drops and other antiviral drugs. If it is bacterial conjunctivitis, patients need to follow the doctor’s instructions to apply levofloxacin eye drops, tobramycin eye drops and other antibiotics. 3. Thrombocytopenic purpura: It can be manifested as repeated subconjunctival hemorrhage. Patients need to follow the doctor’s instructions to apply dexamethasone and other glucocorticoids and immunoglobulin. Some patients also need to follow the doctor’s instructions to apply cyclosporine, methotrexate and other immunosuppressive drugs. Splenectomy may be considered in patients with severe and heavy bleeding. There are many causes of subconjunctival hemorrhage, and it is necessary to go to the hospital to complete the relevant examinations, and cooperate with the doctor after the cause of the disease is clearly identified and actively treated.