Ringing in the ears is a symptom of tinnitus, which can be caused by external auditory canal diseases, middle ear diseases and neurogenic tinnitus. 1. Diseases of the external auditory canal: cerumen embolization of the external auditory canal is common, and cerumen is commonly known as earwax, which should be removed from the ear in a timely manner. Others include inflammation of the external auditory canal, foreign bodies in the external auditory canal, and tumors in the external auditory canal, etc., all of which can cause tinnitus. 2. Middle ear diseases: acute otitis media, acute secretory otitis media, chronic suppurative otitis media, etc., often accompanied by tinnitus. 3. Neurogenic tinnitus: in the absence of an external sound source, the patient subjectively hears a variety of sounds, manifested as cicadas in the ear, buzzing, hissing, including sensorineural tinnitus, peripheral neurogenic tinnitus, and central neurogenic tinnitus. It is recommended that patients seek timely medical treatment to identify the causes of tinnitus, and should actively cooperate with the doctor to treat the disease to avoid aggravation of the condition after the cause of the disease has been clarified.