What causes sudden eye bleeding?

Sudden bleeding of the eye is caused by subconjunctival hemorrhage, which is generally considered to be caused by rupture of small blood vessels on the eye surface. It may be related to factors such as trauma, cough, constipation, hypertension, diabetes, etc. If there is trauma, it is recommended to go to the hospital as soon as possible. If it does not affect vision and is not injured, this situation can be temporarily observed first. Cold compress and antibiotic eye drops are given within 48 hours. Generally, 1 to 2 weeks can recover. However, it is best to go to the hospital to check blood pressure, blood sugar, blood lipids and other cardiovascular problems. In addition, some conjunctivitis will also show subconjunctival hemorrhage, need to give corresponding anti-infection according to the cause, symptomatic treatment. If the fundus bleeding is common, retinal vein occlusion, diabetes, age-related macular degeneration, etc., also need to go to the ophthalmology to improve the fundus and other related examinations, further diagnosis and treatment.