Fatigue is a state of being without energy for a prolonged period of time. [1][2] The word fatigue is used in two contexts: in the medical sense, and in the sense of normal tiredness. Nov 12, 2025 Β· Fatigue is a lingering tiredness that is constant and limiting. With fatigue, you have unexplained, persistent, and relapsing exhaustion. It's similar to how you feel when you have the flu or... Apr 18, 2023 Β· Fatigue is a term used to describe an overall feeling of tiredness or a lack of energy. Learn about over 30 possible causes, from stress to taking certain medications. Many conditions, disorders, medications and lifestyle factors can cause fatigue. Fatigue can be temporary, or it can be a chronic condition (lasting six months or more). You may be able to quickly … Dec 18, 2025 Β· After a trip, a long day with family or the occasional late night, it’s common to feel tired or a bit sluggish. But fatigue β€” constant exhaustion, tiredness, and a lack of physical and mental energy … Jul 1, 2025 Β· Fatigue refers to a common mental or physical state of extreme tiredness and lack of energy. Learn more about the causes and treatments here. Dec 20, 2024 Β· Extreme fatigue is more than just being low-energy or worn out. It’s a heavy, persistent exhaustion that sticks around even after a full night’s rest. For some people, it shows up as brain fog … Find out about some of the common causes of tiredness and fatigue, treatments and things you can do to help, plus when to get medical advice.

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