When red eyes are found, the first thing to determine is whether it is caused by conjunctival congestion or a subconjunctival hemorrhagic focus caused by the rupture of small blood vessels on the surface of the conjunctiva. If the eyes are found to have no other uncomfortable symptoms, especially in the morning when a bright red blood clot with clear borders suddenly appears in the eyes unintentionally, this condition is generally still considered a subconjunctival hemorrhage. It is caused by the rupture of small blood vessels on the surface of the eye and is commonly seen in elderly patients with hypertension, as well as after various eye traumas. Generally, it may not need to be treated, if the eye has mild discomfort, you can use artificial tear type eye drops to spot the eye, usually 1-2 weeks to subside. If severe eye trauma results in severe conjunctival hemorrhage, it can be treated with oral blood-stasis-activating Chinese medicines. If the conjunctiva of the eye is found to be congested or if there is a marked dilatation of blood vessels near the edge of the cornea, this condition, rather than subconjunctival hemorrhage, is congestion. There are many causes of eye congestion, various chemical irritations, or inflammation, allergies, and foreign bodies later. Therefore, it is recommended to seek timely medical attention at the hospital’s ophthalmology clinic, and if it is caused by inflammation, timely antibiotic eye drops treatment, and if it is caused by a foreign body, timely removal of the foreign body.