Everyone experiences feelings of joy and sadness. But for some individuals, these moods become so extreme or long lasting that t
hey cause significant distress or impairment. Such problems are referred to as mood disorders and are characterized by experiences of depression, mania, or both. The most severe form of depression is called a major depressive episode. Identify the symptoms that are characteristic of a major depressive episode.
A goitre, or goiter, is a swelling in the neck resulting from an enlarged thyroid gland. A goitre can be associated with a thyroid that is not functioning properly. Worldwide, over 90% of goitre cases are caused by iodine deficiency.