The common clinical causes of meniscal injuries include the following three aspects: 1. Meniscal lacerations caused by traumatic factors such as falls from height or violent impacts on the knee joint, accompanied by injuries to the soft tissues surrounding the knee joint, such as the cruciate ligament, collateral ligament and joint capsule. 2. Chronic injuries caused by local strain on the knee joint, such as long-term strenuous sports, frequent climbing, long hours of standing and walking, etc., lead to strain on the meniscus and surrounding tissues of the knee joint, mostly manifesting as local hidden pain, which can be significantly aggravated after activity and relieved after rest. 3. Age factors, with age With age, the meniscus and other tissues of the knee joint undergo degenerative changes, and meniscus injury is likely to occur during sports.