Dry eyes may be caused by overuse of eyes, local nerve damage or inflammation of conjunctival tissue and other factors. 1. Excessive eye use: some people may spend a long time looking at cell phones, computers and other electronic products, but also often stay up late, which may cause eye fatigue, dry eyes and astringent performance. 2. Local nerve damage: high blood glucose concentration or long-term mental stress may cause some damage to the eye nerve tissue, there will also be dry eyes and astringent symptoms. 3. Inflammation of the conjunctival tissue: when there is a bacterial or viral infection in the conjunctiva of the eye, it may cause congestion and edema of the conjunctival tissue, which will also cause dry eyes and astringency, and may be accompanied by a local burning sensation. When the eyes are very dry and astringent, we must pay attention to appropriate rest, you can apply cold compresses to the eyes, and follow the doctor’s instructions to use sodium vitrate eye drops and other drugs for local treatment, if the condition continues to deteriorate, it is best to consult a doctor in a timely manner.