During fever, whether the temperature of the whole body increases?

During fever, whether the temperature of the whole body increases?
No. (1) If the temperature of whole body increases, the body will not try the heat generating methods like, shivering, shrinking of blood vessels, increased respiration and heat beat.
(2) The body is not sweating.
(3) Body likes to have more heat generating techniques like covering with a blanket, hot food intake, etc. (4) The body avoids heat losses, like reduced output of motion, closed hair-holes for avoid sweating, etc.
So it is clear that the temperature increased is in a plane and the heat loss is in a different plane.
If the decrease in heat of the body is the cause of fever, how the low heat of fever creates a higher temperature in the body?
The higher heat of fever is the cumulative action of increased activity by heart, lungs, shivering of muscles, etc.
Whether the temperature difference between the atmosphere and the body creates shivering?
Yes. If the temperature difference is more than 15oC, it will.
Will shivering be there for those do not have difference in the heat of outer body and atmosphere?
Yes. Shivering will be there, during inner fever, administrating glucose (I V) Fluid, after frightening, muscles loss strength, during fits /epilepsy, etc, but there will not be having much difference in the temperature.