Depression is a mood disorder that causes overwhelming feelings of sadness and isolation. If it persists consistently for two weeks or longer it is not just a temporary change in mood. Depression can be a serious medical condition with many emotional and physical symptoms. Such as, loss of interest in activities previously enjoyed, change in sleep or eating habits, fatigue, headaches, feelings of hopelessness, and many others. Therapy is often a very effective form of treatment. It provides the skills and awareness to begin feeling better and preventing the condition from returning in the future. There are many types of therapy available. But long-term therapy usually works best to help alleviate the symptoms.