Though mental fatigue may well result from such circumstances, it also arises out of hard work on a project one enjoys.
Also, general pain, fatigue, and discomfort can result from cancer or cancer treatment.
Fatigue is a major safety concern in many fields, but especially in transportation, because fatigue can result in disastrous accidents.
Additionally, fatigue may result from an infection.
When tissues don't get enough oxygen, fatigue can result.
Railroad operators were the "air traffic controllers" of the railroads; long hours and the resulting fatigue could result in errors in judgment and serious accidents.
As your body temperature climbs, lightheadedness, dizziness, nausea, fatigue, and muscle cramps can result.
Metallurgical fatigue can result in the propagation of star cracking from the bolthole.
Mood disturbances and depression as well as chronic fatigue can also result.
When the blood cannot transport enough oxygen to the body, fatigue can result.