For joint effusion with meniscus injury, it can be treated by the following methods: 1, if the patient’s symptoms are not very serious, only mild pain in the joints, and there is no limitation of joint movement and joint popping, interlocking symptoms, then you can consider the conservative treatment, you can brake the knee joint and fix it with a brace for 4-6 weeks, which can promote the healing of the joint injury, and at the same time, prevent meniscus injury from further aggravation. 2, if the meniscus injury with effusion has severe knee pain, physical therapy or hot compresses, which can play a role in promoting the absorption of the effusion. Further aggravation of meniscus injury, at the same time, we should puncture the effusion to draw fluid, physical therapy or hot compresses, which can play a role in promoting the absorption of effusion. 2, if the meniscus injury accompanied by effusion with severe knee pain, as well as popping, cross-locking symptoms, and impaired mobility of the knee, this time to consider the surgical treatment, can be minimally invasive arthroscopic surgery, to explore the degree of meniscus injury, depending on the degree of meniscus injury, the meniscus can be treated with a surgical procedure. Depending on the degree of meniscus damage, meniscal suture or partial meniscectomy can be performed, and most patients can have good results.