Sorry for the late reply but among my numerous research I knew I had some info regarding tinnitus and have only just found it I hope this is of some help, but please forgive if it has come too late or is irrelevant now. Hope your feeling ok today.
Thyroid problems, or temporary abnormalities (such as occur in pregnant women or people with anemia) can increase blood flow through the jugular vein, which passes near the auditory nerve, causing the pulse. Treatment is for thyroid conditions.
What causes pulsatile tinnitus?
Pulsatile tinnitus is due to a change in blood flow in the vessels near the ear or to a change in awareness of that blood flow. The involved vessels include the large arteries and veins in the neck and base of the skull and smaller ones in the ear itself. The blood flow can be altered by a variety of factors:
Generalised increased blood flow
Blood that is flowing quickly generates more noise than blood that is flowing slowly. Increased blood flow throughout the body can occur in strenuous exercise or pregnancy. It can also occur in severe anaemia or when the thyroid gland is over active, a condition known as hyperthyroidism or thyrotoxicosis.