When eating, the mouth joints will be ringing, considering that it is caused by physiological factors, there may also be temporomandibular joint disorder syndrome and other problems. 1. Physiological factors, part of the population in the chewing process if the chewing strength is too large, there may be mouth joints will be ringing symptoms, this situation is generally more normal, is the bone joint friction sound. 2. Temporomandibular joint disorder syndrome, some patients with temporomandibular joint disorder syndrome may lead to temporomandibular joint function is affected, so there will be joints and the corresponding muscle pain, popping, abnormal movement and other symptoms. If such symptoms occur repeatedly, it is necessary to be alert to the possibility of the disease, and it is best to consult a doctor in time for examination and treatment.