No, you still sweat, more than you would sweat if you were in better shape
That's normal. Means your kidneys are working and that your body isn't retaining water in an unhealthy way.
Sweat is the bodies method of maintaining a proper temperature, especially when exerting oneself. However, excessive sweating is a medical condition that can be treated by a doctor.
You get hives from having an allergic reaction to something or itching to much.
Oh yeah, I have met people who go angry black out,