When diabetes is complicated by eye congestion, the etiology should be clarified first. Eye congestion may be caused by trauma, diabetic retinopathy, infection, etc. If it is diabetic retinopathy, its treatment mainly includes symptomatic treatment (medication, lifestyle, etc.) and etiologic treatment. 1. Symptomatic treatment: The main treatment is medication, which can be taken orally to activate blood circulation and remove blood stasis (to promote blood circulation and eliminate blood stasis in the body), and improve microcirculation, such as calcium hydroxybenzenesulphonate, to reduce congestion in the eyes. 2. General treatment: pay attention to eye rest, avoid reading books, newspapers, watching TV for a long time, avoid fatigue, and keep a good and sufficient sleep. At the same time, quit smoking and drinking. 3. Etiological treatment: diabetic eye congestion, the first step is to control blood glucose, take glucose-lowering drugs such as acarbose, metformin, or insulin injection on time to maintain the stability of blood glucose, which is the fundamental treatment for various complications of diabetes mellitus. Therefore, if diabetic eye congestion must go to endocrinology and ophthalmology for relevant formal treatment, under the guidance of the doctor.