The blood streaks observed on the eyes are mainly the conjunctiva and blood vessels on the surface of the eye that are congested. There are actually several main causes that can cause conjunctival congestion in daily life, and it is first necessary to distinguish whether the cause is physiological or pathological. The most common physiological cause is fatigue and eye congestion caused by long-term bad eye habits. This type of eye congestion often has no other accompanying signs, but may have some symptoms such as dry, itchy, painful eyes. For this type of conjunctival congestion, the main treatment is to improve one’s eye habits and avoid long-term fatigue symptoms, which can be relieved after the eye fatigue is relieved. There are also some ocular surface diseases that can cause conjunctival congestion, most commonly conjunctivitis, sclerenitis, keratitis, and other inflammatory diseases of the ocular surface tissue. For this type of disease, treatment should be tailored to the type of inflammation, including antibiotics or antiviral medications if the inflammation is infectious. In the case of non-infectious immune inflammatory diseases, treatment is mainly with non-steroidal anti-inflammatory drugs or hormonal drugs.