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 or injury like headaches, digestive problems, pain and thoughts of death or suicide.
Bipolar disorder involves episodes of depression and also episodes of mania like inappropriate sense of euphoria (excitement), reckless behavior, little sleep needed, excessive energy, racing thoughts; talking too much, out of control spending, difficulty concentrating, irritability, abnormally increased activity including sexual activity, poor judgment, aggressive behavior, extreme irritability or out of control behavior. People with depression do not experience manic episodes.
And an episode whether depressive or manic can last for days, weeks, months or even years. It is very essential to note that the...