What cause the Ringing sound only in one ear?

There are several potential causes for ringing sound, also known as tinnitus, in only one ear:

Earwax Blockage: A buildup of earwax in the ear canal can cause sound waves to be distorted, leading to a ringing sensation in one ear.

Otitis Media: An infection or inflammation of the middle ear can cause fluid buildup and pressure changes, resulting in tinnitus.

Meniere's Disease: A condition affecting the inner ear, characterized by episodes of vertigo, hearing loss, and ringing in one or both ears.

Acoustic Neuroma: A noncancerous tumor that grows on the nerve between the brain and the inner ear can cause hearing loss, balance problems, and tinnitus in the affected ear.

Ototoxicity: Some medications, such as certain antibiotics, chemotherapy drugs, and high doses of aspirin, can cause damage to the inner ear, leading to tinnitus.

Head Injury: A head injury, particularly one involving the skull or temporal bone, can damage the structures of the inner ear and cause tinnitus in one ear.

TMJ Disorders: Problems with the temporomandibular joint (TMJ), which connects the jaw to the skull, can cause clicking or popping sounds and sometimes tinnitus in one or both ears.

It's important to consult with an audiologist or ear, nose, and throat (ENT) specialist to determine the exact cause of tinnitus in one ear. They will perform a thorough evaluation, including hearing tests, to identify the underlying issue and recommend appropriate treatment.