The human meniscus is actually a very important structure in the knee joint, both our medial and lateral menisci are C-shaped structures, which are embedded between the femur and tibia. between the cartilage and the cartilage. As you can see, the meniscus plays a very important role in the movement of the lower extremity. Once it is torn, its stability and integrity are greatly compromised. This is manifested by pain, swelling, popping and interlocking. When the meniscus is torn, the cartilage of the femur and tibial plateau in the opposite negative circumferential area is the most likely to be damaged first. MRI is the imaging method of choice for detecting meniscal injuries and can also look at the lateral collateral and cruciate ligaments. If meniscus injury is found, take measures as follows: 1, the acute phase can be cold compresses to reduce bleeding, reduce pain, relieve symptoms to shorten the acute reaction period. 2, suspend activities, rest. 3. For those with interlocking phenomenon, the knee joint can be unlocked by moving it under the guidance of a doctor. 4. In chronic patients, interlocking phenomenon, pain and swelling will occur frequently because the damaged and ruptured meniscus cannot heal. In order to reduce and prevent the adverse consequences of bone, cartilage and synovial lesions secondary to meniscal injury and eventually osteoarthritis, arthroscopic surgery is preferable to early treatment. 5.Adjunctive treatment can be given, such as the use of herbal fumigation, local closure, physiotherapy, etc., which should be carried out under the guidance of a specialist.