Joint locking occurs mainly in the knee joint. Due to the damage to the meniscus in the knee joint, the patient is prone to arthrogryposis when moving around. When a patient has interlocked knee, he or she will first feel severe knee pain and localized pressure pain, and the knee joint will be in half extension and half flexion, and the knee joint will become dysfunctional. After the meniscus is repositioned, or unlocked, the patient’s knee joint can be restored to its normal state and the patient can move normally. Therefore, when a patient has interlocked knee joints, the patient should be instructed to reduce activities and avoid getting cold during treatment. The knee joint should be fumigated with Chinese herbal medicine or a topical ointment to relieve blood stasis, swelling and pain, and sodium vitreous acid can be injected into the knee joint to nourish the joint cartilage and reduce the occurrence of joint interlock.