What is Fatigue and What Does it Feel Like?

Fatigue is a symptom of many chronic illnesses, but… What is it? What does it feel like?

Fatigue is a feeling of complete exhaustion that does not improve with rest or sleep. It’s muscle weakness and constant tiredness physically, mentally, or both. Fatigue is sometimes described as being the same as extreme tiredness or sleepiness, but it’s far different. Tiredness and sleepiness can be resolved with a nap, whereas fatigue will remain even with a nap and plentiful rest.