Blood in the eyes is mostly seen in the following cases: First, irregular work and rest, staying up late for a long time, poor rest caused by, it is recommended to develop healthy work and rest habits. Second, prolonged close use of the eyes, such as reading cell phones, watching TV, playing with computers, etc., will result in conjunctival congestion with dry and fatigued eyes. It is recommended to use the eyes at close range for about 30 minutes, then relax the ciliary muscle for 10 minutes and apply local heat. Allergic conjunctivitis, conjunctival congestion with itchy eyes, can be localized cold compresses to relieve the discomfort. Topical anti-allergy eye drops, or weak hormonal eye drops, cyclosporine eye drops for symptomatic treatment, usually pay attention to avoid contact with allergens. Fourth, dry eye, dry eye surface, tear film instability causes conjunctival congestion discomfort. Patients can apply local heat, massage the lid gland, and use local drops of preservative-free artificial tears for symptomatic treatment.