10 Norovirus Symptoms
Reviewed: Dr. Mera
Symptom #5: Lethargy and Weakness
Lethargy is a feeling of tiredness, lack of energy, and fatigue. It is a symptom of certain illnesses, such as viral infections and diarrhea, and it is occasionally accompanied by decreased motivation, apathy, and depression.
Some causes of lethargy include overexertion, lack of sleep, inadequate exercise, improper nutrition, and boredom. It can also be a side effect of medications (or an interaction between medications), increased stress, and alcohol consumption.
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