Have you ever felt so lost in your life, not knowing what you are doing or making a living? Then, start to feel discouraged and hopeless and think over that it is pointless to live. Or even consider suicide. If so, you should go to a psychologist because you have symptoms of depression. Moreover, if you start to take immediate action, it may worsen and become more painful, which may cause you to be one of the one-fourth of a million people in America suicide each year. Depression isn’t just an illness that presents with depressed mood, loss of interest or pleasure, decreased energy, feelings of guilt or low self-worth, disturbed sleep or appetite, and poor concentration. However, it is a very complicated mental illness that can lead to various effects. But, what causes depression? There is no right answer to what causes depression, it may be caused by a variety of reasons. For example, trauma, abuse, significant events, a death or a loss, and genes can all cause depression.