What is the cause of tinnitus in the left ear?

The cause of tinnitus:? ① Excessive fatigue, lack of sleep and emotional stress can also lead to tinnitus.

② Ear diseases, such as otitis externa, external auditory canal embolism and foreign bodies, acute and chronic inflammation of middle ear, perforation of tympanic membrane, otosclerosis, Meniere's syndrome and acoustic neuroma of inner ear, can cause tinnitus.

③ Other systemic diseases can also cause tinnitus: autonomic nervous system disorder, insufficient cerebral blood supply, pre-stroke, hypertension, hypotension, anemia, diabetes and malnutrition.

In addition, excessive use of toxic drugs such as gentamicin, streptomycin or kanamycin can also lead to tinnitus and hearing loss, and tinnitus occurs earlier than hearing loss.