Meniscus damage is usually manifested as pain, swelling, limited joint movement and other symptoms, meniscus damage degree is different, the performance is different. 1. Mild meniscus injury: it can be manifested as mild knee pain, the pain can be aggravated when the knee joint activities, the local examination may or may not have pressure pain, and the knee flexion and extension activities are generally not limited. 2. Moderate meniscus injury: manifested as a slight tear of the meniscus, the degree of local knee pain will be significantly worse than before, the appearance of the knee joint may have symptoms of swelling, local pressure and pain is more obvious, activities can be limited joint activities. 3. Severe meniscus injury: knee pain is relatively strong, localized swelling is obvious, in the knee joint flexion and extension activities can occur when the activities of the joints are limited or even interlocked. Whether the meniscus is damaged needs to be clarified by MRI, if the above symptoms occur, please consult a doctor in time to clarify the cause of the disease and follow the doctor’s instructions for standardized treatment.