For various reasons, some people may get depressed and requires treatment for depression. Depression can be biological that runs with the family or it can be developed. The symptoms can affect in some ways in the way you think, feel, behave and manifest yourself with other people. This could affect your way of life, relationships with friends and family and work. Often, the feeling of sadness or left alone, unproductive at work, negative thoughts and emotional imbalance, eating disorder, lack of sleep among others are some manifestations that can be alarming and requires medical attention.