There are many reasons for a tumor growing inside the ear, which may be tumor of the external ear canal, middle ear tumor, internal auditory canal tumor, which may be benign or malignant. 1. External auditory canal: if a tumor grows inside the ear in the external auditory canal, it may be caused by hemangioma, cholesteatoma of the external auditory canal, fibroma, scar lumps, ceruminous adenocarcinoma and other factors. 2. Middle ear: if the tumor appears in the middle ear, it may be caused by squamous cell carcinoma of middle ear, tympanic body tumor, cholesteatoma of middle ear. 3. Inner auditory canal: if a tumor grows inside the ear in the inner auditory canal, it may be due to factors such as acoustic neuroma and facial nerve sheath tumor. There are many reasons for having a tumor inside the ear, and it is recommended to go to the hospital in time to improve the examination and take standardized treatment according to the doctor’s prescription after the symptoms appear.