Lethargy is a state of tiredness, sleepiness, weariness,
fatigue, sluggishness or lack of energy. It can be accompanied by
depression, decreased motivation, or
apathy
Apathy is a lack of feeling, emotion, interest, or concern about something. It is a state of indifference, or the suppression of emotions such as concern, excitement, motivation, or passion. An apathetic individual has an absence of inter ...
. Lethargy can be a normal response to inadequate sleep, overexertion, overworking, stress, lack of exercise, improper nutrition,
boredom, or a symptom of an underlying illness or a disorder. It may also be a side-effect of medication or caused by an interaction between medications or medication(s) and
alcohol. It may also be an
altered level of consciousness.
When part of a normal response, lethargy often resolves with rest, adequate sleep, decreased stress, physical exercise, and good nutrition. Lethargy's symptoms however can last days or even months,
so it can be a sign of a recent underlying illness or infection if it doesn't resolve normally.
See also
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Clinical depression
Major depressive disorder (MDD), also known as clinical depression, is a mental disorder characterized by at least two weeks of pervasive low mood, low self-esteem, and loss of interest or pleasure in normally enjoyable activities. Intro ...
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Encephalitis lethargica
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Sleep apnea
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Sleep deprivation
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Somnolence
References
External links
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Symptoms
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