Many mental health and medical conditions have similar symptoms to depression—such as fatigue and sleep problems—so you may think you have depression when you actually don't. Here are the facts about depression, disorders with similar symptoms, and how to tell them apart. Depression: The Basics Depression is a common mental health condition that affects the way you feel, think, and behave. You ...

Agitation depression (AD) is a special type of depression that, in addition to low mood, is also accompanied by psychomotor agitation and escape from thoughts. Patients with this disorder often exhibit uneasiness, irritability, impulsivity, hostility and other behaviors, which seriously affect their quality of life and social functions. Agitation depression is closely associated with bipolar disor...

Depression, also called major depressive disorder or clinical depression, is a mood disorder whose symptoms include persistent sadness or lack of interest in life. Most of us feel sad, lonely, or depressed at times. This is a normal reaction to loss, struggles in life, or damaged self-esteem. But when intense sadness—which includes feeling helpless, hopeless, and worthless—lasts from days to wee...