A fatigue that can be caused by constant worry is "PSYCHOLOGICAL FATIGUE"
• Psychological fatigue is when a individual is tired and this is normally caused by boredom, constant worry and mental stress.
• Psychological results in lack of energy.
• Physical fatigue is when an individual is tired and find it hard physically to do the things that they normally enjoy doing.
• Pathological fatigue is caused by illnesses.
The correct answer is PSYCHOLOGICAL FATIGUE.