A pulsing sensation in your ear, often described as a whooshing or rhythmic thumping that matches your heartbeat, is called pulsatile tinnitus. Unlike the steady ringing that most people associate with tinnitus, this type is caused by actual blood flow that your ear is picking up. It accounts for less than 5% of all tinnitus cases, and because it has a physical source, it’s one of the few forms of tinnitus that can often be identified and treated.
What Pulsatile Tinnitus Sounds Like
Most people describe it as a whooshing, swooshing, or thumping sound that speeds up when their heart rate increases, like during exercise or stress. Some compare it to hearing a fetal heartbeat on an ultrasound monitor. The sound often has a crescendo-decrescendo quality, meaning it swells and fades with each heartbeat. It can affect one ear or both, and it may be constant or come and go depending on your position, activity level, or blood pressure at any given moment.
This is fundamentally different from the continuous ringing or buzzing of standard tinnitus. That steady-tone version is typically caused by damage to the tiny hair cells in your inner ear and has no vascular connection. Pulsatile tinnitus, by contrast, is your ear detecting turbulent or amplified blood flow in nearby vessels. That distinction matters because it means there’s usually something identifiable driving the sound.
Blood Vessel Problems Near the Ear
The most common explanation for ear pulsing involves the blood vessels that run close to your middle and inner ear. Your head and neck contain a dense network of arteries and veins, and several of them pass within millimeters of the structures responsible for hearing. When blood flow through these vessels becomes turbulent or unusually strong, your ear can pick up the sound.
On the arterial side, narrowing of the carotid artery (the large artery in your neck) from plaque buildup can force blood through a tighter space, creating turbulence that your ear detects. A condition called fibromuscular dysplasia, where artery walls develop abnormally, can have a similar effect. In rarer cases, an internal carotid artery that takes an unusual path through the middle ear can transmit its pulse directly to the eardrum.
On the venous side, the sigmoid sinus, a large vein that drains blood from your brain and runs right behind the ear, is a frequent culprit. Small outpouchings or abnormal widening of this vein can create turbulent flow that sounds like a rhythmic whoosh. Narrowing of the veins that drain the brain can also increase pressure and produce the same effect. These venous causes are among the most treatable forms of pulsatile tinnitus.
High Blood Pressure and Increased Blood Flow
Sometimes the vessels themselves are perfectly normal, but the blood moving through them is flowing harder or faster than usual. Uncontrolled high blood pressure is one of the most straightforward causes of ear pulsing. When your blood pressure rises, the force of each heartbeat pushes blood more aggressively past the delicate structures of the ear, making the pulse audible. Many people first notice the pulsing during periods of stress, exercise, or when lying down with one ear pressed against a pillow.
Anemia and thyroid conditions can also increase blood flow throughout the body. When your blood is thinner (as in anemia) or your metabolism is running high (as in hyperthyroidism), your heart compensates by pumping faster and harder, which can make blood flow audible in places it normally wouldn’t be. In these cases, treating the underlying condition often resolves the pulsing entirely.
Pressure Buildup Around the Brain
A condition called idiopathic intracranial hypertension (IIH) causes elevated pressure of the cerebrospinal fluid surrounding the brain, and pulsatile tinnitus is one of its hallmark symptoms. Researchers believe the elevated pressure may result from a blockage in the pathways that cerebrospinal fluid normally uses to circulate, or from narrowing of large veins in the brain that prevents blood from draining efficiently. Either way, fluid or blood backs up, increasing pressure inside the skull.
IIH most commonly affects women of childbearing age, particularly those who are overweight. Beyond the ear pulsing, it typically causes headaches (often worse in the morning or when bending over), visual disturbances, and blind spots. Diagnosis involves a combination of eye exams to check for swelling of the optic nerve, brain imaging with CT or MRI, and a spinal tap to measure fluid pressure directly. If IIH is the cause of your ear pulsing, bringing the pressure down with medication or weight loss usually improves or eliminates the sound.
A Hole in the Inner Ear Bone
Superior canal dehiscence syndrome (SCDS) is a rare structural condition where a small opening develops in the thin bone that separates the inner ear from the brain cavity. The hole doesn’t allow fluid to leak, because the lining of the brain still covers it, but it creates an abnormal pathway for sound and pressure to enter the inner ear.
People with SCDS often hear their own body sounds at startling volume. Your pulse, your voice, your stomach gurgling, even the movement of your eyeballs can become audible in the affected ear. This phenomenon is called autophony. Beyond the internal sounds, SCDS can cause dizziness triggered by loud noises or changes in pressure (like sneezing or straining). A high-resolution CT scan of the temporal bone can identify the opening, and surgical repair is an option for severe cases.
Tumors and Growths
Small, usually benign tumors called glomus tumors can grow in the middle ear, right on the bony ridge near the cochlea. These growths are highly vascular, meaning they have a rich blood supply, and they can transmit the pulsing of blood directly to the hearing structures. A doctor examining your ear may see a reddish mass behind the eardrum, though this isn’t always visible. Other vascular abnormalities, like an unusually high-riding jugular vein, can look similar on examination. Imaging is needed to tell them apart.
How Doctors Find the Cause
Because pulsatile tinnitus has a physical source, imaging is the cornerstone of diagnosis. Your doctor will likely start with an otoscope exam to look for visible abnormalities behind the eardrum. If nothing is apparent, the American College of Radiology considers MRI of the head with contrast and MRA (a type of MRI focused on blood vessels) to be the standard first-line imaging. CT angiography of the head and neck, which maps blood vessels in high detail, is also rated as appropriate.
If your doctor suspects a bony abnormality or sees something behind your eardrum, a CT scan of the temporal bone (the skull bone housing the ear) is the preferred starting point. In some cases, you may need a combination of these scans, since arterial and venous causes require different types of imaging to visualize properly. The goal is always to find the specific vessel, structure, or condition generating the sound, because treatment depends entirely on the cause.
Treatment Depends on the Cause
This is the encouraging part: because pulsatile tinnitus stems from an identifiable source, many cases can be improved or resolved. If high blood pressure is the driver, managing it with lifestyle changes or medication often quiets the sound. If anemia or a thyroid condition is making blood flow too forcefully, correcting that condition addresses the symptom at its root.
For structural causes, the approach varies. Venous abnormalities like sigmoid sinus problems can sometimes be treated with stenting, a minimally invasive procedure that opens the narrowed vein from the inside. Glomus tumors may be removed surgically or treated with embolization, which cuts off the tumor’s blood supply. SCDS can be repaired surgically by plugging or resurfacing the opening in the bone. IIH is typically managed with medications that reduce fluid production in the brain, along with weight loss when applicable.
Warning Signs That Need Urgent Attention
Most ear pulsing turns out to be benign, but certain combinations of symptoms signal something more serious. Seek emergency care if the pulsing starts suddenly, particularly if it’s only in one ear. A sudden onset can indicate a vascular emergency like an arterial dissection (a tear in a blood vessel wall). If the pulsing comes with vision changes, difficulty with balance, severe headache, or any neurological symptoms like weakness or confusion, those are red flags that warrant immediate evaluation. Gradual, mild pulsing that you’ve noticed for weeks or months still deserves a medical workup, but it’s less likely to represent an emergency.