It did not take long before he began experiencing unusual fatigue and pain in the abdominal section. (fitnessandpower.com)
In case you experience severe and unusual fatigue even when you have not engaged yourself I a physically demanding activity, it could be an indication that you have low level of testosterone. (beautyzion.com)
A sudden drop in carbs can lead to a drop in energy levels, with some dieters reporting unusual fatigue, confusion, or brain fog. (health.com)