In the outpatient clinic, we often encounter patients who say in a hurry and panic, “Doctor, look at my eye, why is it bleeding? Look in the mirror and you’ll be scared to death, do you think it’s okay?” Most of these patients have subconjunctival hemorrhage, which is a rupture of a small blood vessel under the bulbar conjunctiva. There are many causes, such as violent cough, elevated chest and abdominal pressure (breath-holding, heavy lifting, etc.), trauma, inflammation, alcoholism, and secondary bleeding from systemic diseases that affect the function of the coagulation system, as well as some primary subconjunctival bleeding without obvious causes. The bleeding may be punctate or flaky, bright red in the early stages, dark red after about 1 week, and gradually absorbed after 1-2 weeks. Small flaky subconjunctival hemorrhage does not require special treatment, but more hemorrhage can be stopped by local cold compresses, later hot compresses to promote the absorption of bruises, antibiotic eye drops or eye ointment, and avoid strenuous activities. If there are secondary factors, treatment should be directed at the cause.