Pregnancy can trigger pulsatile tinnitus, the rhythmic whooshing or thumping sound in one or both ears that keeps time with your heartbeat. The connection is physiological: pregnancy dramatically increases blood volume and cardiac output, and that extra blood flow through vessels near the ear can become audible. In one clinical study of patients with pulsatile tinnitus, about 2.4% identified pregnancy as the event or factor present when their symptoms began.1Journal of NeuroInterventional Surgery. Clinical evaluation of pulsatile tinnitus: History and physical exam techniques to predict vascular etiology That number probably understates how often it happens, since many cases resolve after delivery and never reach a specialist.
What Changes in Pregnancy Make Pulsatile Tinnitus Possible
Your body goes through enormous cardiovascular shifts to support a growing fetus. Blood volume rises by roughly 40 to 50 percent over the course of pregnancy, and cardiac output climbs in parallel. This creates what clinicians describe as a hyperdynamic circulation, meaning your heart is pumping more blood, faster, through the same network of vessels. When that increased flow passes through arteries and veins near the inner ear or the base of the skull, the turbulence can become something you actually hear.
Several mechanisms have been proposed for why this translates into tinnitus. The increased circulation itself is one factor. A second is elevated pressure on the fluid inside the inner ear. A third involves the hormonal environment: estrogen and progesterone, which surge during pregnancy, alter the tissues lining blood vessels and can affect fluid balance in the ear.2Journal of Otology. Otological manifestations in pregnant women – A study at a tertiary care hospital of eastern India These hormones also cause the mucous membranes throughout your body to swell, including the tissues in the Eustachian tube and middle ear. The combination of more blood moving through wider, more congested vessels near your ears is what sets up the conditions for pulsatile tinnitus to emerge.
Intracranial venous pressure also tends to rise during pregnancy, particularly in the later trimesters, because the growing uterus puts pressure on the inferior vena cava and changes the dynamics of blood returning to the heart.3Radiology Case Reports. Sigmoid sinus dural arteriovenous fistula presenting with pulsatile tinnitus in the postpartum period: A case report The venous sinuses inside the skull, which drain blood from the brain, can become somewhat engorged. The sigmoid sinus sits right behind the ear, so even a modest increase in flow or pressure there can produce a sound you perceive as a rhythmic pulse.
How Common Is It Really
Getting a clean number on how many pregnant people experience pulsatile tinnitus is harder than it sounds. Most studies of tinnitus in pregnancy lump together all forms, including the more common continuous ringing or buzzing that is not pulsatile at all. The pulsatile variety, which has a distinct beat-like quality, is a smaller subset. In a study that looked at patients presenting to a specialist clinic for pulsatile tinnitus evaluation, four out of 164 patients linked the onset of their symptoms to pregnancy.1Journal of NeuroInterventional Surgery. Clinical evaluation of pulsatile tinnitus: History and physical exam techniques to predict vascular etiology That puts pregnancy on roughly the same footing as dental procedures and well below head trauma or flights as a triggering event in that particular patient population.
But that study was looking at people who had persistent pulsatile tinnitus severe enough to see a specialist, which skews toward cases that did not resolve on their own. A much larger group of pregnant people probably notice a rhythmic ear sound at some point during pregnancy, shrug it off, and find it disappears after delivery. Those cases never show up in specialist clinic data. The true incidence during pregnancy is almost certainly higher than what clinical series capture.
When During Pregnancy It Tends to Appear
Pulsatile tinnitus related to pregnancy most commonly shows up in the second or third trimester, which makes sense given the cardiovascular timeline. Blood volume peaks around weeks 32 to 34, and cardiac output is highest during roughly the same window. Some people notice it earlier, particularly if they have an underlying predisposition like a narrowed venous sinus or a preexisting vascular variant near the ear that was previously silent. Pregnancy’s hemodynamic changes can essentially unmask an anatomical quirk that had never caused trouble before.
Certain pregnancy-related conditions can also accelerate the timeline. Preeclampsia, which involves high blood pressure and can develop after week 20, raises the chances of pulsatile tinnitus because elevated blood pressure increases the force of blood flow through cranial vessels. Gestational anemia, where hemoglobin drops significantly, can also contribute: when the blood is thinner, the heart compensates by pumping harder and faster, increasing flow turbulence. If you develop pulsatile tinnitus alongside headaches, visual changes, or sudden swelling, those could be warning signs of preeclampsia and warrant urgent medical evaluation regardless of the tinnitus.
Does It Go Away After Delivery
For many people, yes. Once blood volume returns to its pre-pregnancy level over the weeks following delivery, and hormonal levels normalize, the hemodynamic drivers of pulsatile tinnitus fade. Most pregnancy-related cases that are purely circulatory in origin resolve within the first few months postpartum without any specific treatment.
There are exceptions, though. If the pulsatile tinnitus was caused by pregnancy unmasking a structural vascular issue, that underlying issue does not go away when the pregnancy ends. In a case report from 2025, a woman developed pulsatile tinnitus in the postpartum period that turned out to be caused by a dural arteriovenous fistula of the sigmoid sinus, a type of abnormal connection between an artery and a vein inside the skull.3Radiology Case Reports. Sigmoid sinus dural arteriovenous fistula presenting with pulsatile tinnitus in the postpartum period: A case report That kind of structural problem needs its own treatment and will not resolve simply because the pregnancy is over. The takeaway is that pulsatile tinnitus that persists well beyond the postpartum period, especially past three to six months, deserves a closer look.
The Diagnostic Challenge During Pregnancy
This is where things get frustrating. The standard workup for pulsatile tinnitus in a non-pregnant patient typically involves imaging to look at the blood vessels around the ear and inside the skull. MRI with specialized vascular sequences, CT angiography, and conventional angiography are the main tools. None of these are recommended during pregnancy.4Australian Journal of Otolaryngology. The assessment of pulsatile tinnitus—a systematic review of underlying pathologies and modern diagnostic approaches CT involves ionizing radiation, conventional angiography is invasive, and while MRI is generally considered safer, gadolinium contrast (which is often needed for good vascular imaging) crosses the placenta and its effects on the fetus are not well understood.
This means that for most pregnant patients, the diagnostic approach relies heavily on a thorough clinical history and physical exam. Your doctor may listen over the skull and neck with a stethoscope to check for a bruit, the medical term for an audible sound made by turbulent blood flow. If they can hear the same sound you are hearing, that is a strong clue that there is a real vascular source. Doppler ultrasound of the neck vessels is safe during pregnancy and can rule out some causes, though it cannot see the intracranial vessels well.
In practice, if pulsatile tinnitus during pregnancy is not accompanied by alarming symptoms like severe headache, vision problems, or neurological changes, the usual approach is watchful waiting. The reasoning is that most cases are driven by the temporary hemodynamic changes of pregnancy and will resolve. If the symptom persists postpartum, full imaging becomes safe and appropriate at that point.
How to Tell Pulsatile Tinnitus Apart From Regular Tinnitus
Many people hear ringing, buzzing, or hissing in their ears during pregnancy, and most of that is regular (non-pulsatile) tinnitus, which has different causes and different implications. The distinguishing feature of pulsatile tinnitus is its rhythm. If you place your fingers on your neck or wrist and find your pulse, then compare that beat to the sound in your ear, they should match up almost exactly. The sound often changes when you turn your head, press on your neck, or exert yourself. Some people find that it gets louder when they lie on one side and quieter on the other, because position changes how blood drains through the venous sinuses near the ear.
Regular tinnitus, by contrast, tends to be a steady tone or hiss that does not beat in time with your heart. During pregnancy, it is most commonly linked to hormonal fluid shifts affecting the inner ear or mild hearing changes. It is more common than the pulsatile variety and usually benign, though it can be distressing. If you are not sure which type you are experiencing, recording the sound pattern on your phone and describing it to your doctor can be helpful. The distinction matters because pulsatile tinnitus, while often harmless, sometimes points to a vascular cause that needs investigation.
Vascular Causes Worth Knowing About
Most pregnancy-related pulsatile tinnitus is benign and driven entirely by normal cardiovascular changes. But there are rarer vascular causes that pregnancy can either trigger or unmask, and being aware of them is useful context for understanding when the symptom deserves more attention.
Idiopathic intracranial hypertension (IIH) involves elevated pressure of the fluid surrounding the brain. It is more common in women of childbearing age and can be worsened by weight gain during pregnancy. Pulsatile tinnitus is one of its hallmark symptoms, along with headache and visual disturbances. If you already had IIH before becoming pregnant, pregnancy can intensify it. And some people first develop IIH during pregnancy, with pulsatile tinnitus being the symptom that brings them to a doctor.
Dural arteriovenous fistulas, like the case mentioned earlier, are abnormal connections between arteries and veins within the coverings of the brain. Pregnancy’s hemodynamic changes are thought to potentially contribute to forming or enlarging these fistulas. They are rare, but they are the kind of structural problem that imaging would eventually find if symptoms persist.3Radiology Case Reports. Sigmoid sinus dural arteriovenous fistula presenting with pulsatile tinnitus in the postpartum period: A case report
Venous sinus stenosis, where a venous channel in the skull is narrower than normal, can also produce pulsatile tinnitus. You might have a mild narrowing that causes no symptoms until pregnancy’s extra blood volume creates enough turbulence to generate a sound. This is an example of a preexisting variant being unmasked rather than caused by pregnancy.
What You Can Do About It During Pregnancy
If your doctor has evaluated you and determined that the pulsatile tinnitus is likely related to the normal hemodynamic changes of pregnancy, management is mostly about coping with an annoying symptom while waiting for it to resolve. There is no medication specifically approved to treat pulsatile tinnitus during pregnancy, and most of the interventions used in non-pregnant patients (like imaging-guided procedures) are not appropriate until after delivery.
A few practical strategies can help reduce how much the sound bothers you. Sleeping with your head slightly elevated can lower intracranial venous pressure, which may quiet the sound at night. Background sound machines or fans can partially mask the rhythmic noise, especially when falling asleep. Staying well hydrated and addressing anemia if you have it (with your provider’s guidance on iron supplementation) tackles two of the circulatory factors that make the sound louder. Avoiding caffeine in excess is sometimes suggested, though the evidence for caffeine worsening pulsatile tinnitus specifically is thin.
Stress and sleep deprivation tend to make all forms of tinnitus more noticeable and harder to cope with, so the usual pregnancy advice about rest applies doubly here. The sound itself is real, not imagined, but your brain’s response to it is partly what determines how distressing it is. Some people find that once they understand the cause and know it is likely temporary, it becomes much easier to live with.
Red Flags That Change the Conversation
While most pulsatile tinnitus during pregnancy is a nuisance rather than a danger, certain accompanying symptoms should prompt urgent evaluation. Sudden severe headache, especially one that feels different from typical pregnancy headaches, may suggest preeclampsia or elevated intracranial pressure. Visual changes, including brief episodes where your vision goes gray or you see flashing lights, can indicate pressure on the optic nerve. Pulsatile tinnitus that becomes suddenly louder or changes character after straining, coughing, or bearing down could signal a change in a vascular structure.
Neurological symptoms like weakness on one side of your body, difficulty speaking, or numbness are always emergencies regardless of context, but they are especially important to flag if you already have pulsatile tinnitus, because in rare cases these can indicate a problem with a vessel that imaging would otherwise have caught earlier. The overall message is not to panic about a rhythmic ear sound during pregnancy, but to pay attention to the company it keeps. On its own, it is usually benign. With other symptoms, it is worth a call to your provider the same day.
Pregnancy as One of Many Triggers
Pregnancy is far from the only life event that can set off pulsatile tinnitus. In the same clinical study that identified pregnancy as a trigger in about 2.4% of cases, flights and air travel accounted for about 7%, and head or neck trauma or surgery accounted for a similar proportion.1Journal of NeuroInterventional Surgery. Clinical evaluation of pulsatile tinnitus: History and physical exam techniques to predict vascular etiology Sinus infections, dental work, and even periods of elevated stress were also reported. What these triggers share is that they all involve some change in blood flow dynamics, pressure, or vessel configuration near the ear. Pregnancy stands out not because it is the most common trigger, but because it involves sustained hemodynamic changes lasting months rather than a single acute event, and because the imaging limitations during pregnancy complicate the workup in ways that other triggers do not.