If you hear a pulse-like noise in your ears, it may be pulsatile tinnitus. This is a rare condition caused when your blood vessels make sounds you can hear. Pulsatile tinnitus is almost always benign, but it could be caused by a serious underlying condition such as atherosclerosis (plaque buildup in the arteries) or a tumor.
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Honor Society of Nursing (STTI) answered
Howard LeWine, Internal Medicine, answeredWhat you are describing is called pulsatile tinnitus. Most often people complain of a whooshing or thumping sound, often in sync with one's heartbeat.
It is actually quite common. Often people will be aware of their heartbeat in their ear, similar to what you describe. Sometimes, another person can hear the noise by getting very close to your ear and listening carefully. Or your doctor can hear it with a stethoscope.
Usually pulsatile tinnitus is not a cause for concern, especially if it lasts just a short time. Similar to you, many people are more aware of it at night.
However, you should contact your doctor. High blood pressure, ear problems and an overactive thyroid gland can cause pulsatile tinnitus. On rare occasions, pulsatile tinnitus can be a symptom of an abnormality of the carotid artery.