Thyroid nodules are lumps that occur in the thyroid gland in the front of the throat ... Photography by Tatsiana Volkava/Getty Images & Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar ...

The thyroid gland produces and regulates thyroid hormones. These hormones can affect energy levels, mood, even weight. They can also be factors in depression. Read on to find out what causes ...