*Mental tiredness doesn’t follow rules. You can sleep 10 hours and still feel like you didn’t sleep at all. * this is just facts because it happens to me sometimes. Mental tiredness can be related to health substandard, anything. Mental deals with the brain and the controller of the whole body system is the brain. It is of importance that regular time off from certain system okay, so it don't affect your mental health and gradually becomes a physical body deteriorating occasion @wardah