Vital exhaustion, or burnout, is classified by the World Health Organisation (WHO) as an “occupational phenomenon”. It results from “chronic workplace stress that has not been successfully managed,” says the WHO, and is characterised by three factors: feelings of energy depletion or exhaustion; increased mental distance or negativity surrounding your job; and reduced productivity.
Article source: https://www.huffingtonpost.co.uk/entry/this-is-what-happens-to-your-brain-when-you-work-too-hard_uk_62f604e8e4b0526eaee97f22