Nearly everyone struggles with being overtired or overworked from time to time. Such instances of temporary fatigue usually have an identifiable cause and a likely remedy.
Chronic fatigue, on the other hand, lasts longer and is more profound. It's a nearly constant state of weariness that develops over time and diminishes your energy and mental capacity. Fatigue at this level impacts your emotional and psychological well-being, too.
Fatigue isn't the same thing as sleepiness, although it's often accompanied by a desire to sleep — and a lack of motivation to do anything else.
In some cases, fatigue is a symptom of an underlying medical problem that requires medical treatment. Most of the time, however, fatigue can be traced to one or more of your habits or routines.