Patients with meniscus injury, the main symptoms and manifestations are pain, swelling, joint popping, cross-locking and so on. 1. Pain: patients in the early stage of injury will have severe pain, mostly located on one side of the joint, pain in flexion and extension angle, lateral meniscus injury patients have popping. 2. Swelling: meniscus injury patients will have joint effusion, especially the meniscus has a large or mixed tear patients, tear with degenerative arthritis, there are intermittent joint effusion. 3. Joint popping: If the patient is acutely injured, there is a tearing sensation or popping, and the affected side will have a ringing sound when performing activities, accompanied by pain. 4. Interlocking: the joint is fixed in semi-flexion or even impaired, but it can be bent, at this time, the meniscus is embedded between the rolling surfaces of the joints, and it can not be released. It is recommended that patients go to the regular hospital in time, under the guidance of the doctor, the relevant examination, according to the patient’s specific examination results, to take targeted treatment.