Hearing your heartbeat in your ears is called pulsatile tinnitus, and it happens when blood flow near your ear becomes loud enough for the structures of your inner ear to pick it up. Unlike regular tinnitus (a constant ringing or buzzing), this rhythmic thumping or whooshing matches your pulse and almost always has an identifiable physical cause. That’s actually good news: because the sound has a source, it can often be diagnosed and treated.
How Blood Flow Becomes Audible
Blood normally flows through your arteries and veins in smooth, silent layers. When something disrupts that smooth flow and makes it turbulent, the turbulence creates vibrations that travel through bone and tissue to your inner ear. Your ear is surrounded by major blood vessels, so it doesn’t take much extra turbulence to produce a sound you can hear. Think of it like water flowing quietly through a garden hose until you pinch it partway shut: the narrowing creates a rushing noise.
The sound can also become audible when your ear itself becomes more sensitive to normal blood flow. A tiny opening or thinning in the bone of the inner ear, for instance, can act like a new window that lets internal body sounds through. In these cases the blood flow is perfectly normal, but the barrier between it and your hearing has been compromised.
Arterial Causes
The single most common cause of pulsatile tinnitus is atherosclerosis in the carotid arteries, the large vessels on either side of your neck that supply blood to your brain. When fatty plaques narrow these arteries, blood squeezes through the tighter opening and becomes turbulent. You typically hear the sound on the same side as the affected artery.
Narrowing doesn’t have to come from plaque buildup. Some people have conditions that thicken or stiffen artery walls throughout the body. Even a natural variation in where a major artery sits near the base of the skull can bring it close enough to the ear to produce an audible pulse, even in someone with completely normal blood pressure and no artery disease at all.
Small, highly vascular tumors called paragangliomas (sometimes called glomus tumors) can also grow in the middle ear or at the base of the skull. These are almost always benign, but because they’re packed with tiny blood vessels, they essentially place a ball of pulsing blood right next to your eardrum. On examination, a doctor may see a reddish mass behind the eardrum.
Venous Causes and Brain Fluid Pressure
Not all pulsatile tinnitus comes from arteries. The most common vein-related cause is a condition called idiopathic intracranial hypertension (IIH), where pressure from the fluid surrounding the brain rises without an obvious reason like a tumor or infection. An estimated 33% to 63% of people with IIH experience pulsatile tinnitus. The current theory is that the elevated fluid pressure presses on veins and alters blood flow patterns near the ear, creating the rhythmic sound.
IIH is most common in women of childbearing age, particularly those who are overweight. Along with the whooshing in the ears, it often causes headaches, visual changes, and sometimes double vision. Interestingly, people whose primary complaint is pulsatile tinnitus (rather than headache or vision problems) tend to have somewhat lower fluid pressures than other IIH patients. That means pulsatile tinnitus can be an early or isolated sign of the condition, showing up before more dramatic symptoms appear.
Structural Problems in the Ear
A condition called superior semicircular canal dehiscence occurs when the thin layer of bone covering one of the balance canals in the inner ear is abnormally thin or missing entirely. This creates what researchers describe as a “third window” into the inner ear (in addition to the two natural openings). That extra window changes how sound pressure moves through the ear in two ways: it diverts some outside sound away from the hearing organ, which can cause a mild hearing loss, and it amplifies internal sounds like your own heartbeat, breathing, and even eye movements. People with this condition often describe hearing their footsteps boom inside their head or noticing their pulse whenever they lie down.
Whole-Body Conditions That Increase Blood Flow
Sometimes the issue isn’t a single blood vessel or structural problem but an overall increase in how hard and fast your heart pumps. Conditions that raise cardiac output, meaning the total volume of blood your heart moves per minute, can make blood flow noisy enough to hear. The most common culprits are:
- Anemia: When your blood carries fewer oxygen-carrying red blood cells, your heart compensates by pumping faster and harder.
- Pregnancy: Blood volume increases significantly, and the heart works harder to supply both parent and fetus.
- Overactive thyroid: Excess thyroid hormone revs up your metabolism and heart rate.
In these situations, treating the underlying condition often resolves the pulsatile tinnitus entirely.
The Role of High Blood Pressure
High blood pressure has been linked to tinnitus through several pathways. It can damage the tiny blood vessels that supply the inner ear, it can accelerate plaque buildup in the carotid arteries, and the increased force of blood flow itself can generate audible turbulence. In one study, vascular tinnitus was nearly five times more common in people with hypertension (6.3%) compared to those with normal blood pressure (1.3%).
There’s a complicating factor, too. Some blood pressure medications, including certain diuretics, ACE inhibitors, and calcium channel blockers, have themselves been associated with tinnitus. It’s not always clear whether the medication or the underlying hypertension is responsible, but this is worth discussing with your prescriber if you notice the sound after starting or changing a blood pressure medication.
What the Diagnostic Workup Looks Like
Because pulsatile tinnitus has a structural or vascular cause the majority of the time, imaging is a central part of the evaluation. There’s no single agreed-upon protocol, but most workups start with an MRI of the brain combined with an MR angiogram (to visualize arteries) or MR venogram (to visualize veins). These scans can reveal narrowed arteries, abnormal connections between arteries and veins, tumors, and signs of elevated brain fluid pressure like an empty space where the pituitary gland sits or flattening at the back of the eyeball.
If the initial scans point toward a bone problem in the ear, a CT scan of the temporal bone gives detailed images of the tiny structures surrounding the inner ear, including the semicircular canals and the jugular bulb. For cases where a dangerous vascular malformation is suspected but not confirmed on standard imaging, a more detailed angiogram using contrast dye may follow.
Warning Signs That Need Prompt Evaluation
Most causes of pulsatile tinnitus are not emergencies, but certain accompanying symptoms raise the stakes. Pulsatile tinnitus paired with new headaches, vision changes, nausea, or double vision can signal dangerously elevated brain pressure. If you develop weakness, numbness, or difficulty speaking alongside the sound, that points toward a possible stroke or vascular malformation that needs immediate attention. Another red flag is “objective” tinnitus, meaning the sound is loud enough that someone else (or a stethoscope placed near your ear) can hear it too. This usually indicates a high-flow vascular abnormality that warrants urgent imaging.
Pulsatile tinnitus that appears suddenly, worsens rapidly, or occurs only on one side is also worth getting checked sooner rather than later. The sound itself isn’t dangerous, but because it can be the first sign of conditions ranging from treatable anemia to a vascular malformation, identifying the cause early gives you the most options.