Ear clicking when speaking may be a physiological phenomenon or a symptom of certain diseases, such as secretory otitis media, temporomandibular joint disorder syndrome, etc., and the cause of the problem should be identified in a timely manner. 1. Physiological factors: If more cerumen (earwax) is secreted in the external auditory canal and is not cleaned out in time, the mouth will move when speaking and the cerumen may come into contact with the eardrum, resulting in ringing inside the ear. 2. Pathologic factors: (1) Secretory otitis media, which is associated with dysfunction of the Eustachian tube, infection, or an immune response. Secretory otitis media may cause fluid or pus to accumulate in the patient’s middle ear cavity, and if the patient moves his or her mouth at this time, a ringing sound will appear inside the middle ear. (2) Temporomandibular Joint Disorder Syndrome (TMJDS), which may be caused by changes in occlusal relationship due to stomatologic treatment, or a sudden change in the patient’s chewing habits, which may lead to TMJ disorder. In this case, when the patient moves his mouth, a ringing sound will appear inside his ears, which is actually the sound of friction between the bones. This symptom alone is not enough to diagnose the disease, and it may be caused by other factors, such as the entry of foreign objects in the external ear canal. It is recommended to consult a doctor in time to clarify the cause of the disease and give targeted treatment.