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.
Graves' disease. Graves' disease is the most common cause of overactive thyroid. It can run in families and can occur at any age, although it is most common in women aged 20-40 years old. You are more likely to develop Graves' disease if you smoke. Graves' disease is an autoimmune condition.
Overactive thyroid is more common in women, but anyone can develop the condition. Graves' disease is the most common cause of hyperthyroidism. It's an autoimmune disorder in which an antibody causes the thyroid gland to make too much thyroid hormone. Experts aren't sure what causes Graves' disease. The condition is more common in women and runs in families.