Pulsatile Tinnitus Etiology: Causes and Next Steps

Pulsatile tinnitus is a pulsing, whooshing or thumping sound that usually matches your heartbeat. Etiology means the underlying cause. Unlike steady ringing, heartbeat-matched tinnitus often involves blood flow near the ear—or changes that make normal internal blood-flow sounds easier to hear. It deserves medical assessment rather than an assumption that it is ordinary tinnitus. Tinnitus UK explains these mechanisms.

The sound alone cannot tell you which cause applies. Some causes are treatable and relatively benign; others involve blood vessels or pressure around the brain and need specialist care.

When to seek care

Arrange a medical appointment for new, recurring or persistent heartbeat-matched ear noise, even if it is painless. Seek emergency care if tinnitus occurs with sudden facial weakness, other sudden significant neurological symptoms or acute, uncontrolled vertigo. Sudden unexplained hearing loss—developing all at once or over a few days—also needs immediate medical assessment, not a routine hearing-test appointment. These warning signs are supported by NICE tinnitus guidance and the U.S. National Institute on Deafness and Other Communication Disorders.

What can cause pulsatile tinnitus?

Clinicians consider several groups of causes. This is not a checklist for diagnosing yourself.

Changes in veins near the ear

Blood draining from the brain passes through large venous channels, called venous sinuses. Narrowing of these channels can alter blood flow and produce an audible pulse. Other possible causes include an outpouching of the sigmoid sinus, called a diverticulum, or a high-riding jugular bulb, a part of a neck vein positioned unusually close to the hearing organ. UCSF’s pulsatile tinnitus service describes these venous causes.

Increased pressure around the brain

Idiopathic intracranial hypertension (IIH) means increased pressure in the fluid surrounding the brain without an identified cause. It can produce pulsatile tinnitus along with headaches and visual disturbances. It is different from high blood pressure measured with an arm cuff. Tell your clinician about headaches or changes in vision because they may change which specialists and tests are needed. Tinnitus UK explains IIH and its assessment.

Arterial disease or abnormal artery-to-vein connections

Narrowing of an artery, including carotid artery narrowing in the neck, can create abnormal blood flow. A dural arteriovenous fistula is an abnormal connection between arteries and veins in the covering around the brain. Some fistulas carry important risks and require treatment. UCSF describes these conditions. A fistula’s risk depends on how blood drains through it, as explained in this clinical review of pulsatile tinnitus.

These are reasons clinicians investigate pulsatile tinnitus—not evidence that every whooshing sound is dangerous.

Increased blood flow throughout the body

Severe anemia and an overactive thyroid can increase blood flow enough to make it audible. Pregnancy and strenuous exercise can also increase flow. High blood pressure is another possible contributor, but it is not the only explanation for a heartbeat-matched sound. Tinnitus UK lists increased-flow causes, while UCSF includes high blood pressure. Our guide to tinnitus and blood pressure covers that distinction in more detail.

Ear changes or nearby tumors

Conductive hearing loss—difficulty carrying sound through the outer or middle ear—can make internal body sounds more noticeable. Examples include middle-ear fluid or a perforated eardrum. Tumors with a rich blood supply near the ear or skull base can also generate pulsatile noise; many tumors associated with this symptom are benign. “Benign” does not mean they can be ignored. Tinnitus UK explains these possibilities.

Rhythmic clicking that does not match the pulse may have a different mechanism, such as repetitive middle-ear or palate muscle contractions. Describing the timing accurately helps distinguish these possibilities.

How clinicians investigate the cause

Start with your primary care clinician or an ear, nose and throat specialist. Before the appointment, note:

• When the sound started and whether it is constant or intermittent.
• Whether it affects one ear or both.
• Whether it matches your wrist pulse.
• Any hearing change, dizziness, headaches or visual symptoms.
• Relevant medical conditions, pregnancy and medications.

Evaluation commonly includes an ear examination, listening around the head and neck with a stethoscope, and a hearing test. Blood tests may check for anemia or thyroid disease when suspected. A clinician does not have to hear the sound for your symptom to warrant investigation. Tinnitus UK describes this assessment.

Imaging is often part of the workup. Depending on the examination and suspected cause, clinicians may choose CT, MRI or dedicated imaging of arteries and veins. A normal-looking ear does not automatically rule out a vascular cause. RadiologyInfo’s imaging guidance outlines these options.

Treatment follows the finding: correcting anemia, managing a pressure disorder or treating a selected vascular or ear abnormality are different decisions. Not everyone needs a procedure, and testing does not always identify a cause. If symptoms continue after an unrevealing evaluation, ask whether further review by a specialist experienced in pulsatile tinnitus is appropriate.