Is this the first time that you have encountered the term “Decision Fatigue”? Don’t worry, you are not alone. A lot of people do not even know that this term exists. What is Decision fatigue? Decision fatigue is the impaired ability to make decisions after a long session of decision making. Seems like a minor hurdle right? Not so. It seems like taking a rest in between making important decisions is the obvious brain fatigue treatment, but that’s not the case.