Answer:
The tinnitus can be caused by the following reasons:
Loud sound: The prolonged or long exposure towards the loud sound may cause the tinnitus condition.
Benign tumor: The development of benign tumor in ear is rare. This tumor can also cause the tinnitus in an individual ear.
Aging process: The normal aging process responsible for the damage of cochlea and deterioration of the other ear parts, can also cause tinnitus.
Mieniere's disease: The inner part of the ear is mostly affected in this disease and main reason of tinnitus. The worse condition of this disease may cause hearing loss.