Cartilage rupture belongs to cartilage injury, and its typical symptoms mainly include soreness and discomfort of joints, continuous or progressive pain during activities. 1. Soreness and discomfort: patients have pain during activities or semi-squatting position, or even feel pain when resting, which is caused by mild swelling of the joints after cartilage rupture, which reduces the joint space and occasionally touches the free body. 2. Continuous or progressive pain during activities: the pain is often obvious at the beginning of the activity, relieved after the activity is carried out, but aggravated at the end of the activity or when resting, which is more significant when going downstairs or downhill. 3. Bruising: muscle skin or mucous membranes and other tissues due to inflammation or bruising and congestion of blood and make the volume increase, resulting in subcutaneous capillary rupture or bleeding. Because the blood penetrates into the skin from the broken capillaries, bruises can be seen on the skin, and because of the abundance of subcutaneous nerves, the pain is obvious.