Symptoms of synovial chondromatosis of the temporomandibular joint may include pain, joint murmurs, and difficulty opening or chewing the mouth. 1. Pain: The area where pain occurs with the highest frequency is roughly in the joint area in front of the ear, and can be palpated when the mouth is opened or closed. Pain can also occur within the distribution of the masticatory muscles associated with chewing, speaking, and opening the mouth, such as the bilateral temporalis and biting muscle areas. 2. Joint murmurs: when the jaw moves such as opening the mouth, there will be murmurs appearing in the joints bilaterally, some murmurs are more crisp, some murmurs are more delicate. 3. Difficulty in opening the mouth or chewing: when the patient has TMJ synovial chondromatosis, it will affect the range of opening the mouth, and at the same time, chewing, pronouncing, speaking, etc., will be affected. If the patient has the above symptoms, it is recommended to go to the hospital in time for early and regular treatment.