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You have not mentioned your age, sex, height, weight. Do you get frequent headaches and blurring of vision. Pulsatile tinnitus
can be used to describe your symptom. It can be caused by a variety of conditions like a carotid aneurysm, benign intracranial hypertension
, giant cell arteritis
. But most of the time it is a subjective sensation and could be normal as well. It would be best to consult a Neurologist
to rule out the above conditions, which once treated will not trouble you again in this manner.