Bipolar disorder affects around 45 million people worldwide, according to the WHO . It's not just extreme mood swings — it disrupts how you think, sleep, relate to others, and function every single day. Here's everything you need to understand it clearly. What Is Bipolar Disorder? Bipolar disorder is a long-term mental health condition marked by intense mood episodes — from manic highs to depressive lows — that significantly interfere with daily life. It is classified as a m