Rehabilitation of narrowing of the medial joint space depends on the severity of the disease. 1. Mild lesions: If the narrowing of the joint space is not obvious and does not affect the function of the joint, oral treatment with medications that nourish the articular cartilage, such as Glucosamine Hydrochloride capsules and Chondroitin Sulfate tablets, can be considered. 2. Moderate lesions: The degree of narrowing of the joint space is more obvious, affecting the joint activities, you can consider receiving arthroscopic surgical repair treatment, which is generally not too invasive and can be restored to normal. 3. Severe lesions: If the narrowing of the joint space is very serious and causes joint ankylosis, it is generally necessary to consider undergoing joint replacement surgery, which requires the use of artificial materials to replace the diseased joint tissues. It is recommended that patients go to a regular hospital to receive examination, according to the results of the examination, under the guidance of a specialized doctor to choose the appropriate treatment for themselves.