What is lethargy?

Lethargy refers to persistent tiredness and is usually a symptom of another illness rather than being an ailment itself. The common causes of lethargy are:

  • Anaemia, diabetes and thyroid disease
  • Stress and depression
  • Chronic fatigue syndrome
  • Insomnia

Occasionally, lethargy can even be a sign of serious illness, so consult your doctor if you suddenly experience fatigue. Blood tests need to be conducted to rule out diabetes, anaemia, thyroid disease etc.

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