Fatigue and exhaustion are going around - we are all struggling. But why? What is really going on here? What is fatigue, what causes it, and why does everybody I know have it? We'll do a quick overview of the causes of fatigue, including lack of resources, poor sleep, chronic stress, and all the rest. We'll talk about how your body protects itself sometimes by getting tired and lifestyle factors that play into it. Genes are also important with fatigue, but the research is shockingly scarce.