Cognitive fatigue is the deterioration in the ability to think effectively and maintain focus. Just like physical fatigue, prolonged mental activity can cause tiredness that affects the mind. Various ...

In some cases, fatigue and nausea may develop as a result of lifestyle factors, such as difficulty sleeping or lack of exercise. In other cases, they may signal an underlying medical condition that ...

People are often surprised by how fatigued they are during a COVID infection. Fatigue is more than being worn out or sleepy. It’s an excessive tiredness that persists despite resting or good sleep. It ...