Manic depression, now more commonly known as bipolar disorder, is a chronic mental health condition characterized by alternating episodes of mania or hypomania (periods of abnormally elevated mood, increased energy, impulsive behavior, and reduced need for sleep) and depression (persistent sadness, loss of interest, fatigue, and feelings of hopelessness). The disorder results from a complex interaction of genetic, neurochemical, and environmental factors and can significantly affect daily functioning, relationships, and quality of life. Treatment typically involves mood stabilizers, atypical antipsychotics, psychotherapy, and lifestyle management to reduce symptom severity, prevent relapses, and improve long-term outcomes.