What Causes Intermittent Rise In Body Temperature,dizziness And Nausea?

hello, my name is Matt. I have some question as to infrequent or semi-periodic symptoms that I experience. it comes mostly in the form of a sudden attack , and with a sharp, quick rise in body temperature, sweating, dizziness, weakness, and some nausea...then as it recedes I get cold again very quickly and still feel considerably weak for some moments afterward. At times these episodes can be strong enough that I have to lay down, wherever I happen to be , and seem to lose all strength in my body. This only happens every once in a great while, but I always wonder what is happening. Is this common symptoms of blood sugar problems, or something else? Thanks for your help.