Meniscus 1 degree injury with effusion can be treated by puncture and extraction of fluid, plaster immobilization, functional exercise, anti-inflammatory and analgesic drugs, physical therapy and so on. Meniscus 1 degree injury with effusion generally belongs to mild injury, can be given conservative treatment. 1. Acute stage: If there is obvious fluid or blood accumulation in the joint, puncture and fluid extraction should be given, and then the knee joint should be immobilized with plaster in the functional position for 2 to 3 weeks. The patient can walk on the ground with the cast. In the period of immobilization and after removing the immobilization, the quadriceps muscle strength training should be actively carried out. 2. Chronic period: mild meniscus injury can be prescribed oral celecoxib and other anti-inflammatory and analgesic drugs; ultrashort wave, intermediate-frequency pulsed electrotherapy and magnetic therapy and other physical therapy; as well as external application of diclofenac diethylamide cream and so on. If necessary, local injection therapy can be given to inject the analgesic solution into the joint cavity after suctioning the fluid in the joint cavity, and braking and resting. If non-surgical treatment is ineffective, the damaged meniscus should be surgically removed as soon as possible to prevent adverse effects. Meniscus 1 degree injury with effusion should be standardized treatment as soon as possible, in order to reduce the adverse effects of the disease, the above drugs are recommended to be used under the guidance of a doctor.