This document provides information about bipolar disorder, including its symptoms, types, causes, effects, myths, and treatment. Bipolar disorder involves periods of elevated or irritable mood alternating with periods of depression. It is a serious mental illness caused by genetic and environmental factors that affect neurotransmitters in the brain. Bipolar disorder can impair individuals' relationships and job performance, and increase risks of suicide. Treatment involves medication, psychotherapy, lifestyle management, education, and social support.