Typically veins are generally wider than arteries, and therefore the pressure is lower. Capillaries are tiny vessels, so repsent high resistance to the incoming blood, so the rate of blood flow through will be quite low. All blood from the artery eventually passes through capillaries and into the vein.
Other causes of an overactive thyroid can include inflammation of the thyroid due to viruses or bacterial infections. Also, postpartum hyperthyroidism affects women immediately after pregnancy. This is one of the most common postpartum health disorders, and it affects between ten and twenty percent of women.
Hyperthyroidism is caused by an overactive thyroid, which means the thyroid produces too much hormone. This can cause rapid heart rate, high blood pressure, and unexpected or sudden weight loss. Hypothyroidism is caused by an underactive thyroid, which means the thyroid doesnât produce enough hormones.