Everyone knows the taxing feeling of being burned out from work. Debilitating headaches, mental fatigue, difficulty concentrating—it’s an overwhelming feeling that’s hard to shake. As such, the World Health Organization just released new guidelines defining burnout as “chronic workplace stress that has not been successfully managed,” in an updated version of the International Classification of Diseases, or ICD-11, NPR reports . It’s also classifying burnout as a clinical syndrome, legitimizing it for the first time. The Reason to Save Your Stress For The Morning: You're Ready for It Previously, the WHO had defined burnout as a “state of vital exhaustion,” but the updated language is much more specific. Under the new definition, burnout has three aspects: exhaustion and low energy levels, cynicism or “increased mental distance from one’s job,” and lowered productivity and efficacy in the workplace. In addition, it’s defined as a work-specific syndrome, unrelated to experienc...