Tinnitus can be caused by intracranial lesions, therefore, the presence of tinnitus is necessary to perform a CT of the brain in order to understand the cause of tinnitus. There are many causes of tinnitus, including cerumen impaction of the external auditory canal, otosclerosis, eustachian tube dysfunction, Meniere’s disease, acoustic neuroma, cerebrovascular anomalies, myoclonus, and increased intracranial pressure. Some lesions are located in the skull and cannot be directly observed through physical examination, so imaging tests such as CT of the brain are needed for diagnosis and evaluation. At the same time, it should be noted that some functional tinnitus caused by neuropsychological factors may not be detected by CT brain imaging, but the results of this examination can be used as an exclusion indicator for a variety of diseases, which is also very meaningful. If tinnitus occurs, it is recommended to go to the hospital in time; whether or not CT examination is needed needs to be judged by the clinician in combination with the condition and other factors.