Like any chronic illness, fibromyalgia can take a toll on your mood. The unrelenting pain, lack of sleep, and persistent fatigue can dampen even the most lighthearted spirits. As a result, you may start to feel hopeless and sad, which can spiral into a case of full-blown depression.

We all have days when we're feeling down, but depression is much more than that. People who have depression feel a persistent sadness or emptiness, and they often feel hopeless and pessimistic about life. They may also experience feelings of guilt, worthlessness, or helplessness. Hobbies and activities that they once pursued with zeal are suddenly no longer enjoyable.

In people who have fibromyalgia, depression can be hazardous. Being depressed can make it harder for you to take care of yourself, to eat well and exercise, and to follow your doctor's instructions. It can make you negligent about your health. If severe enough, it may result in suicidal thoughts or actions. Depression should never be taken lightly and should be brought to the attention of a health-care professional.