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  1. Fatigue: Causes & Treatment - Cleveland Clinic

    Apr 13, 2023 · Fatigue The definition of fatigue is extreme tiredness. Severe fatigue makes it difficult for you to get up in the morning and make it through your day. Many conditions and …

  2. Fatigue - Wikipedia

    Fatigue is a state of being without energy for a prolonged period of time. [1][2] Fatigue is used in two contexts: in the medical sense, and in the sense of normal tiredness. In the medical …

  3. Fatigue: Causes, Diagnosis, Treatment & More - Healthline

    Apr 18, 2023 · Fatigue is a term used to describe an overall feeling of tiredness or lack of energy. It isn’t the same as simply feeling drowsy or sleepy. When you’re fatigued, you have no …

  4. Fatigue and Exhaustion: Causes, Symptoms, and Treatment

    Nov 12, 2025 · 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 …

  5. Should You Be Concerned About Your Fatigue? - Verywell Health

    Nov 3, 2025 · Fatigue is a feeling of intense exhaustion and lack of motivation that doesn't simply disappear with a good night's rest. Many health conditions and lifestyle factors can cause …

  6. Fatigue: Why am I so tired, and what can I do about it?

    Jul 1, 2025 · There are two main types of fatigue: physical and mental. Someone with physical fatigue may find it physically hard to do the things they usually do, such as climbing the stairs. …

  7. Fatigue and Exhaustion: Causes, Symptoms, Treatment

    Oct 14, 2015 · Fatigue can be described as a lack of energy and motivation (both physical and mental). This is different than drowsiness, a term that describes the need to sleep.