Bipolar Disorder is also known as Manic Depressive disorder. The person experiences alternate phases of two states viz. mania and depression. Mania includes symptoms such as high energy, excitement, reduced need for sleep and loss of touch with reality, impulsivity, delusion, etc. Depressive state symptoms include low energy and motivation, loss of interest in daily activities, extreme sadness, apathy, feeling of hopelessness, fatigue, guilt, etc. Main causative factors are genetic factors, imbalance in neurotransmitters such as dopamine and epinephrine; environmental factors such as traumatic event.