Grade 1 injuries to the meniscus are usually MRI-described and usually require no management. Knee joint effusion should firstly identify the cause of the disease, focus on treating the primary disease, and provide symptomatic treatment. Although the knee meniscus 1st degree injury does not need to be dealt with, it is important to take care of the knee joint in general, and should not do strenuous exercise to avoid knee injuries as much as possible. After the occurrence of knee joint effusion, first need to clarify the primary disease, such as arthritis, cartilage injury, meniscus injury, etc., should prioritize the treatment of the primary disease. If the fluid in the knee joint is small, the knee joint can be braked, local physical therapy, and wait for the fluid to be absorbed by itself. If there is more fluid and the symptoms are obvious, the fluid can be extracted manually to relieve the symptoms. The knee joint is an important weight-bearing joint in the human body, once the discomfort occurs, you should go to the hospital in time, under the guidance of a professional doctor for diagnosis and treatment.