Cluster headache and migraine are both very painful conditions, but they're not the same. Discover their key differences, similarities, and treatment options for both.

Fibromyalgia is a chronic syndrome that can cause widespread pain in the body. Learn more about the condition, including its symptoms, causes, and treatments.

If warm, sunny days make you feel more gloomy than great, you could have seasonal affective disorder. Learn how to stop it from dragging you down.