A red patch on the eye is not a fundus hemorrhage, but a subconjunctival hemorrhage. The rupture of small blood vessels in the conjunctiva and bleeding gathered under the conjunctiva is called subconjunctival hemorrhage, which is called white eye overflow blood in Chinese medicine. Subconjunctival hemorrhage varies in size and shape, often in flakes or clusters with clear borders, or in large areas that affect the entire bulbar conjunctiva. A small amount is bright red, while a large amount rises to a purple color, mostly in the lid fissure (i.e., the part of the eye exposed between the upper and lower eyelids in the normal open state), and over time the hemorrhage often tends to move toward the corneal limbus (i.e., the black eye), or it may collect under the conjunctiva due to gravity. The bleeding is first bright red or dark red, then turns yellowish and finally disappears without leaving a trace. The bleeding is mostly caused by inflammation or trauma, and spontaneous bleeding is mostly seen in the elderly, with no obvious conscious symptoms at the time of onset, and is usually found by others, with a tendency for the bleeding to increase within 3 days of onset, and generally subsides in about 1 week without leaving traces. It is important to note that if an elderly person is already suffering from systemic diseases such as hypertension, diabetes, blood disorders, etc., when subconjunctival hemorrhage occurs, he should be promptly seen in the hospital, except when fundus hemorrhage occurs at the same time. The disease is generally self-healing in mild cases, and cold compresses are appropriate at first, and hot compresses can be applied after three days as appropriate. In cases caused by violent choking, vomiting, trauma, alcoholism, etc., the main treatment should be directed at the cause.