The thyroid gland is part of the endocrine system (along with the adrenal glands, hypothalamus, pituitary, ovaries, and testes, and other endocrine organs). The thyroid gland releases hormones into ...

(Photo Credit: E+/Getty Images) The vertebrae in your upper back and neck form the cervical spine. Some common causes of upper back pain include: Poor posture. Your spine works best when you stand ...