Depression

A few episodes of sadness is not out of the ordinary, but symptoms that lower quality of life or become downright debilitating should be addressed – they're not part of normal aging. Here's what to look for when it comes to the symptoms, causes, and treatment.

The diagnostic criteria of depression in the DSM-5 (that classifies mental illnesses) are diminished pleasure in everyday activities and a chronic lowered mood – but it also includes some lesser thought-about physical symptoms that you should know.