what causes pulse in ear
1 Pulsatile tinnitus is usually due to a small blood vessel that is coupled by fluid to your ear drum. It is usually nothing serious and also untreatable.  Rarely pulsatile tinnitus can be caused by more serious problems -- aneurysms, increased pressure in the head (hydrocephalus), and hardening of the arteries. A vascular tumor such as a glomus may fill the middle ear, or a vein similar to a varicose vein may make enough noise to be heard.
1 A vascular tumor such as a glomus may fill the middle ear, or a vein similar to a varicose vein may make enough noise to be heard.  Inner ear disorders that increase hearing sensitivity (such as SCD) can cause pulsatile tinnitus.