The white of the eye normally does not appear a red blood clot, when this situation is generally considered to be a pathological change, the possible triggering factors are bacterial infection, conjunctival congestion, ocular hypertension, etc., when there is a sudden red blood clot in the white of the eye to actively check the treatment, so as not to endanger eye health. 1, bacterial infection: caused by bacteria in the eye infection will appear white blood clots, common causative agents are The common pathogenic bacteria are staphylococcus, staphylococcus aureus, etc. Bacterial infections can cause conjunctivitis, endophthalmitis, lacrimal ductitis, etc., and can be treated with some anti-inflammatory and antiseptic injections, eye drops, eye coating drugs, etc.; 2, conjunctival congestion: conjunctival congestion can be divided into simple conjunctival congestion, ciliary congestion and mixed congestion several, general red blood clots are common in simple conjunctival congestion, the cause of congestion may be caused by bad Subconjunctival congestion when the microvascular rupture of the eye, when the rupture of the blood vessels will appear bleeding in the white of the eye, blood clotting will form clots in the eye, for conjunctival congestion common method is to use antibiotics for anti-inflammatory treatment, if there is persistent congestion can be treated first to lower the pressure, and then go to a professional ophthalmology to identify the cause; 3, ocular hypertension: ocular hypertension is due to Eye fatigue, inflammatory stimulation and other phenomena resulting in increased blood pressure, increased blood pressure will stimulate the white of the eye congestion edema, or even bleeding after the formation of blood clots, it is recommended to use drugs to control blood pressure within the normal range, and then use anticoagulant drugs to evacuate blood clots and relieve symptoms. The appearance of red blood clots in the white of the eye in addition to the above-mentioned eye diseases, coughing hard in life, excessive alcohol consumption, etc. can also stimulate the eye this situation, to be treated as soon as possible to prevent the increase in the size of the clot.