A pounding sensation in your ears is most often pulsatile tinnitus, a condition where you hear a rhythmic thumping, whooshing, or beating sound that matches your heartbeat. It accounts for about 4% of all tinnitus cases, and unlike the more common ringing-type tinnitus, pulsatile tinnitus usually has a physical, identifiable cause. That’s important because it means the underlying problem can often be found and treated.
What Pulsatile Tinnitus Feels Like
People describe it differently: a pounding, pulsing, thumping, or whooshing in one or both ears. The defining feature is that the sound keeps time with your pulse. You can verify this yourself by checking your pulse at your wrist while listening to the rhythm in your ear. If they match, that points strongly toward pulsatile tinnitus rather than the more common constant-ringing form of tinnitus, which is generated by the nervous system and has no external sound source.
The intensity often shifts with your body position and activity level. You may notice it gets louder when you lie down, turn your head to one side, sit in a quiet room, or exercise. Anything that increases blood flow or changes pressure in the vessels near your ears can amplify the sound.
Why You Can Hear Your Blood Flow
Normally, blood flows smoothly and silently through the arteries and veins near your ears. Pulsatile tinnitus happens when something disrupts that smooth flow, creating turbulence that’s close enough to your inner ear for you to hear it. Think of it like water rushing through a kinked garden hose: the narrowing or redirection creates noise that wouldn’t exist in a straight, open line.
Several things can create that turbulence. A narrowed artery, an abnormal connection between an artery and a vein, increased pressure inside the skull, or even a thin spot in the bone separating a blood vessel from your ear can all make blood flow audible. In some cases, the sound is loud enough that a doctor can hear it too by placing a stethoscope on your neck or near your ear. When a clinician can hear the sound, it’s called “objective” pulsatile tinnitus, and it’s a strong indicator of a vascular cause.
Common Causes in the Blood Vessels
Most cases of pulsatile tinnitus trace back to something happening in a nearby artery or vein. The specific cause often depends on your age and health profile.
In older adults, the most common culprit is atherosclerosis: fatty buildup inside the arteries of the head and neck that narrows the channel and creates turbulent flow. In younger people, the cause is more likely to be fibromuscular dysplasia, a condition where segments of an artery wall develop abnormally and create areas of narrowing, or a vessel wall tear (dissection) where a small bleed inside the artery wall squeezes the channel shut.
Abnormal connections between arteries and veins, called arteriovenous fistulas, are another significant cause. These short-circuits allow high-pressure arterial blood to rush directly into low-pressure veins, producing what’s often described as an unbearably loud roaring sound. They can develop after head trauma, particularly skull fractures, or form spontaneously in the membranes surrounding the brain. Aside from headaches, pulsatile tinnitus is the most common symptom of these fistulas.
Causes Beyond the Blood Vessels
Not every case involves a problem with an artery or vein. Several other conditions can produce that pounding sensation.
- Increased pressure in the skull. A condition called idiopathic intracranial hypertension (IIH) raises the pressure of the fluid surrounding your brain. It primarily affects young women who carry extra weight, and it can cause pounding in both ears along with headaches and blurred vision. The rhythmic changes in fluid pressure become audible.
- Blood-rich tumors. Paragangliomas (also called glomus tumors) are benign growths that develop near the base of the skull or in the middle ear. Because they’re packed with blood vessels, they create turbulent flow that you hear as a pulsing sound, typically on one side only.
- Bone abnormalities. A thin or absent layer of bone between a blood vessel and the inner ear can let you hear flow you’d normally never notice. Sigmoid sinus dehiscence, where the bony wall next to a major vein near the ear is unusually thin, is significantly more common in people with pulsatile tinnitus than in the general population.
- Conditions that increase blood flow body-wide. Anemia, an overactive thyroid, and pregnancy all boost cardiac output, meaning more blood is pumping through your vessels with each heartbeat. This can make previously silent flow noisy enough to hear.
How It’s Diagnosed
Because pulsatile tinnitus usually has a structural or vascular cause, the diagnostic process is more focused than it is for regular tinnitus. A physical exam comes first: a doctor will listen around your ear and neck with a stethoscope and may ask you to turn your head or hold your breath to see if the sound changes. These simple maneuvers help narrow down whether the source is arterial, venous, or something else entirely.
MRI combined with magnetic resonance angiography (MRA) is the recommended first-line imaging test. It provides detailed views of both the soft tissues and the blood vessels near the ear without radiation exposure. MRI is especially good at spotting tumors, abnormal vessel connections, and signs of increased intracranial pressure like an empty sella (a flattened pituitary gland) or excess fluid around the optic nerves.
CT scans play a complementary role, particularly when bone abnormalities are suspected. CT is better than MRI at showing thin or missing bone, making it the preferred tool for identifying dehiscence or unusual vessel routes through the skull. In emergency settings or when MRI isn’t available, CT angiography and ultrasound can also be used to evaluate the blood vessels of the neck.
One Ear vs. Both Ears
Whether the pounding is in one ear or both offers a diagnostic clue. Unilateral pulsatile tinnitus, heard in just one ear, is more likely caused by a localized problem: a tumor, a fistula, or a vessel abnormality on that side. Bilateral pounding, in both ears, more often points to a systemic issue like increased intracranial pressure, anemia, or thyroid problems.
This isn’t an absolute rule, but it’s one of the first things a clinician will ask about. Combined with your age, weight, other symptoms (especially headaches or vision changes), and whether the sound changes with head position, the pattern helps guide which imaging tests to order and what to look for.
What Happens After Diagnosis
Treatment depends entirely on the underlying cause, which is why getting a proper diagnosis matters so much. For atherosclerotic narrowing, managing cardiovascular risk factors (blood pressure, cholesterol, smoking) can reduce turbulence over time. Arteriovenous fistulas often require a procedure to close the abnormal connection, which can eliminate the sound completely. Paragangliomas may be monitored if small, or treated with surgery or radiation if they’re growing or causing symptoms.
For idiopathic intracranial hypertension, weight loss is one of the most effective interventions. Medications that reduce fluid production in the brain can also lower pressure and relieve the pounding. In cases where thin bone is the problem, surgical repair of the dehiscence can resolve the tinnitus.
The key distinction from regular tinnitus is that pulsatile tinnitus is often curable or significantly improvable once the cause is identified. In studies of patients who undergo targeted treatment for a confirmed cause, many experience complete resolution of the sound. That’s a very different outlook from non-pulsatile tinnitus, which is typically managed rather than cured.