There are many reasons why the white eyeballs of the eyes are congested and red, mainly including overuse of the eyes, conjunctivitis, and foreign objects in the eyes. 1. Excessive eye use: patients read books or use electronic devices for a long time and stay up late for a long time, resulting in excessive eye use, which can cause dilation of the blood vessels in the eyeballs, resulting in congestion of the patient’s white eyeballs, i.e. conjunctival congestion. Patients need to close their eyes and rest to relieve eye fatigue. 2. Conjunctivitis: Bacterial, viral, mycoplasma and other pathogenic infections lead to inflammation of the conjunctiva, and under the stimulation of inflammation, patients may experience conjunctival congestion, which may be accompanied by tearing, pain and other symptoms. 3. Foreign body in the eye: If the patient’s eye enters a foreign body, which stimulates the eye tissues, it can also lead to the patient’s conjunctival congestion, and the patient needs to remove the foreign body in the eye in a timely manner to alleviate the discomfort of the eye. It is recommended that patients with significant conjunctival congestion seek medical attention to assess their condition and treat them under the guidance of a doctor.