Cruciate ligament rupture can be divided into acute and chronic, with different symptoms, which cannot be generalized as follows. 1. Acute injury: generally in strenuous exercise, such as playing soccer, basketball, sharp turn, sharp stop, or when the knee twisting action, the knee will suddenly pain, tenderness. Some patients can even feel the wrong movement of the knee, and even hear the sound of ligament rupture, the knee joint will be obviously swollen, and most people have a lot of blood in the knee joint. 2. Chronic injury: generally on the patient’s daily walking, jogging, may not have much impact, and even most patients do not have any feeling. However, when the patient in the knee, leg rapid change of speed or running, climbing, will feel the knee pain, swelling, weakness, etc., or have a feeling of instability. When patients have the above symptoms, they should go to the hospital in time to clarify the cause of the disease and follow the doctor’s instructions to standardize the treatment.