Some people say that depression feels like a black curtain of despair coming down over their lives. It is not something you can “snap out of.” Many people feel like they have no energy and can't concentrate. Others feel irritable all the time for no apparent reason. For men depression often manifests as anger. The symptoms vary from person to person, but if you feel "down" for more than two weeks, and these feelings are interfering with your daily life, you may be clinically depressed.
Most people who have gone through one episode of depression will, sooner or later, have another one. You may begin to feel some of the symptoms of depression several weeks before you develop a full-blown episode of depression. Learning to recognize these early triggers or symptoms and exploring other concerns that you may be minimizing will help you to gain some relief from depression


