Red blood in the eyes is usually due to dry eye or conjunctivitis, which can be treated by strengthening daily care or through medications such as polyethylene glycol eye drops and levofloxacin eye drops. 1. Dry eye: dry eye, the eyes can not be adequately moisturized, which in turn causes red blood in the eyeballs, and there will also be itchy eyes, tingling sensation and other symptoms, do not over-exertion of the eyes, avoid strenuous exercise, diet should be light, avoid spicy and stimulating food, and at the same time pay attention to the prohibition of smoking and alcohol, to ensure adequate sleep. 2. Conjunctivitis: Conjunctivitis is due to the inflammation of the secretions gathered in the eye, resulting in the appearance of white spots in the eye, red blood and other phenomena, the patient can use polyethylene glycol eye drops, levofloxacin eye drops and other medications under the guidance of a doctor, can inhibit the growth of bacteria, allergy patients should not use. Patients need to develop good habits in daily life, avoid staying up late for a long time, protect the eyes, long time red blood does not relieve, please consult a doctor in time, active treatment, so as not to delay the condition.