The common symptoms of knee dislocation are joint deformity, limited or no movement, and localized swelling and pressure pain. Anterior dislocation refers to the excessive forward deviation of the tibia relative to the femur. The stability of the knee joint and the correspondence between the bones of the knee joint depend mainly on the several ligaments within the knee joint. Generally if a significant joint dislocation occurs, a large degree of damage to the articular ligaments of the knee has occurred and should be promptly examined and treated in a hospital. If the limb is allowed to be given proper immobilization and no more strenuous exercise should be done. Another major symptom of knee dislocation is vascular nerve injury, because the vascular nerve of the lower limb is very close to the knee joint, and some of them will be damaged when dislocation occurs. In this case, symptoms of vascular nerve injury such as paralysis and dullness of sensation in the limb, bruising and pallor in the distal calf and foot will appear, and it is recommended to receive immediate treatment at a hospital.