The eyes are covered with red blood, mainly consider the following situations: First, it may be related to staying up late, poor rest, this time just need to pay attention to rest, reduce staying up late, generally can recover. Second, conjunctivitis, keratitis, uveitis, these kinds of inflammation may lead to red eyes, covered with red blood, at this time you need to go to the hospital, so that the doctor according to the specific characteristics of eye inflammation to develop different treatment methods. Third, glaucoma, people with glaucoma will have elevated eye pressure, resulting in corneal edema, red and congested eyes, photophobia and tearing. If it is glaucoma, the problem is more serious, you need to go to the hospital to do glaucoma-related examination, and determine the pressure reduction treatment afterwards. Fourth, it is possible that trauma has caused a foreign body to enter the eye. If this is the case, the foreign body should be removed and treated symptomatically using the appropriate antibiotic eye drops.