Many patients with temporomandibular joint dysfunction exhibit restricted mouth opening, which seriously affects the daily life of patients. Currently, patients who undergo conservative treatment in our department can improve their mouth opening to varying degrees. However, for some patients with intraspinal muscle spasm, joint contracture or joint ankylosis, after the manipulation treatment, the patients need to cooperate and perform self-extension to further improve the mouth opening and obtain better treatment effect. 1, first prepare 1-20 wooden tongue depressors (can be purchased at medical stores). 2.Place several tongue depressors between the upper and lower teeth on the affected side, so that the joint and its surrounding tissues have some tension, and maintain the stretching for 1-2 minutes, and do it 5-10 times a day. After the stretching can make the joint relax, you can increase the number of tongue depressors placed in the mouth to improve the mouth opening.