Assertion: fatigue | /r/CreatedBy | stress
Facets:
value: usually
type: DEGREE
Source sentences:
text: In most cases, it's acute fatigue -- fatigue that occurs suddenly but lasts less than three months and is usually caused by lifestyle or environmental factors such as physical exertion, stress, lack of sleep, dehydration, or inadequate diet.
text: Usually, fatigue is caused by stress and anxiety, depression, a virus, or a sleep problem.