Depression
High Blood Pressure
A 2007 study found a link between thyroid disorder and high blood pressure. When the thyroid gland doesn't produce enough thyroid hormone, hypothyroidism (or, when it overproduces thyroid hormone, hyperthyroidism), people might experience high blood pressure.
Weight Gain
One of the two main hormones produced by thyroids, triiodothyronine or T3, helps to regulate our metabolism. Even small changes in the production or absorption can change things like body weight and energy levels.
Gastrointestinal Issues
Thyroids impact every organ in the body, and the gut and bowel are no exceptions. Studies are finding a connection between over- and underproduction of the thyroid hormone (both hypo- and hyperthyroidism) and gastrointestinal issues.
Painful Joints
Among the symptoms of hypothyroidism, underproduction of the thyroid hormone, is painful joints, stiffness, swelling and even carpel tunnel syndrome. In its most common form, hypothyroidism puts you at higher risk for developing rheumatoid arthritis.
Always Tired
People whose thyroids aren't producing enough thyroid hormones—or those who have thyroids with maladapted hormone receptors—may experience crushing fatigue at all hours of the day.
Can't Sleep
On the other hand, poorly functioning thyroids may also be the cause of your inability to fall and stay asleep. Hyperthyroidism overstimulates the nervous system, disrupting sleep, causing night sweats and making it hard to fall asleep.
