Depression is of two types one is Major Depressive Disorder and the other Bipolar Disorder. The two are different which require different treatments. The symptoms of the former involves sadness, excessive crying, loss of pleasure, sleeping too much or too little, low energy, restlessness, difficulty in concentrating, irritability, loss of appetite or overeating, feelings of worthlessness and hopelessness, feelings of physical problems that are not caused by physical illness o...