To determine meniscal injury, clinical history, clinical manifestations and imaging examinations can be performed as follows: 1. Clinical history: Patients usually have a clear history of trauma, long-term excessive weight-bearing on the knee joint, and little exercise. 2. 3. Imaging tests: MRI, for example, will show a low signal midline high signal shadow across the meniscus to the joint surface, or a bowtie image deformation. Through the above aspects of comprehensive judgment, it can be determined that the meniscus is damaged. After the diagnosis is confirmed, corresponding treatment methods should be selected according to the severity of the injury, such as avoiding weight-bearing on the affected limb and arthroscopic minimally invasive surgical treatment.