You lie awake at 2 a.m. replaying a conversation from three days ago. You draft and delete the same email five times. You imagine every possible way a decision could go wrong before you have even made it. Sound familiar? You are not alone. Research from the University of Michigan found that 73% of adults aged 25–35 chronically overthink , making it one of the most common — and least discussed — psychological challenges of modern life. But here is the good news: overthinking is not a personality flaw. It is a habit — and habits can be changed. In this guide, we will explore the neuroscience of overthinking , why your brain does it, and evidence-based strategies to help you break the cycle for good. What You Will Learn • What overthinking actually is — and what it is not • The brain science behind rumination and worry loops • ...