Most of the blood vessels under the eyes are obvious, and most of them are caused by conjunctival congestion after prolonged eye strain. Most vasodilatation is seen in patients who stay up late, strain, or use their eyes excessively for a long period of time. Visual fatigue is mainly seen in patients who use their eyes excessively, resulting in a foreign body sensation, itching, and soreness in the eyes. For mild visual fatigue, you can use anti-fatigue eye drops, such as nalmivir eye drops, etc. For severe vascular congestion, you can use vasoconstrictive drugs, such as pralophine eye drops. In life, you can use hot towels for bedtime warm compresses to treat and improve blood circulation in the eyes, which also has a better therapeutic effect on vasodilation.