A sudden red blood clot in the white of the eye may be caused by eye trauma, eye disease, spontaneous bleeding, or due to blood disorders, etc. Specific analysis is needed to clarify the cause and then treat it. 1. Eye trauma: Patients with eye trauma can have punctate or patchy bleeding in the white of the eye, and it is recommended that patients seek medical attention promptly to prevent structural damage to the eye. 2. Eye disease: For example, epidemic hemorrhagic conjunctivitis, severe Bacterial conjunctivitis, can lead to such symptoms. Patients with epidemic hemorrhagic conjunctivitis can be treated with antiviral medications as prescribed by the doctor. For patients with severe bacterial conjunctivitis, antibiotics can be used for treatment; 3. Spontaneous hemorrhage: Most commonly seen in the elderly or in people with systemic diseases, such as hypertension, hyperglycemia or other cardiovascular diseases, can lead to subconjunctival hemorrhage, i.e., red blood clots in the whites of the eyes. In addition, constipation, consumption of irritating foods, and violent coughing can also lead to rupture of small blood vessels in the conjunctiva and spontaneous hemorrhage, which is manifested as a red blood clot in the white of the eye. For patients with spontaneous bleeding, no special treatment is usually required. If the amount of bleeding is high, hemostatic drugs can be used under the guidance of a doctor to promote blood absorption. 4. Blood disorders: Patients with blood disorders can develop subconjunctival bleeding, as well as accompanying bleeding from other parts of the body. In this case, it is recommended that patients go to the hematology department for specialist screening to clarify the cause and then treat the cause.