Fever, when it happens during an injury, is actually helping the body heal. The fever is a symptom of the body getting into a hypermetabolic state which puts everything in a state of emergency and repair. REpairing agents are transported to the site of injury, and the debris from dead cells (from injured part) are removed fast, to prevent infection or bacterial accumulation. So, yes, I realise that when I get a tattoo I get a mild fever that actually repairs my tattoo faster ...:)
The advice for this would be that u drink a lot of water to cool the inflation naturally, eat well and lie back... and enjoy the fever!!