Meniscus injuries that occur when the leg is not able to be bent are caused by an injury to the posterior horn of the meniscus, and bending the leg when the posterior horn of the meniscus is injured can cause the posterior horn of the meniscus to be squeezed between the tibia and the femur, which can further aggravate the injury to the posterior horn of the meniscus. This can increase the pain in the joint due to the injury, and in severe cases, there will be popping or jamming symptoms. Therefore, when meniscus injury, try to avoid long-term squatting work, try to avoid long-term knee strain, long-distance walking, avoid knee twisting sports, such as basketball, soccer, help to protect the meniscus, to prevent further meniscus injury aggravation, but also pay attention to the regular review.