In the United States, up to fifteen percent of the population suffers from tinnitus, known colloquially as "ringing in the ears." In most cases, it is due to damage to the microscopic endings of the hearing nerve in the inner ear, commonly from exposure to loud noise. Other causes include allergy, high or low blood pressure, a tumor, diabetes, thyroid problems, or an injury to the head or neck. Moreover, in many cases it is not a serious problem, but rather a nuisance that eventually resolves...
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