Depression is an emotional disorder that causes a feeling of constant sadness and a loss of interest in performing different activities. Also called “major depressive disorder” or “clinical depression,” it affects a person’s feelings, thoughts and behavior, and can cause a variety of physical and emotional problems. It is possible to have difficulty carrying out daily activities and, at times, feel that it is not worth living. More than just a passing sadness, depression is not a weakness and one cannot recover overnight. Depression may require long-term treatment. But do not be discouraged, most people with depression feel better with medication, psychotherapy, or both.