Hearing a pulse in the left ear is clinically referred to as pulsatile tinnitus. Pulsatile tinnitus is a kind of vascular tinnitus and belongs to objective tinnitus. The causes of pulsatile tinnitus are mainly as follows: First, anomalies in the anatomical structure of the blood vessels in the neck, some patients have diseases such as arteriovenous fistula, jugular vein bulbar tumor, tympanic body tumor, etc., which cause abnormal pulsating sounds in the blood flow. The second type of sound is related to altered hemodynamics, which can occur in patients with severe anemia, severe hyperthyroidism, and other related diseases that cause altered hemodynamics. The pulsating tinnitus sound is mainly in the same rhythm and frequency as the heartbeat. For this disease, it is recommended to consult with brain surgery, otorhinolaryngology, neurology and other related departments.