Hyperthermia is a cancer treatment that involves heating the body tissue to temperatures higher than normal, typically between 104 and 113 degrees Fahrenheit (40 to 45 degrees Celsius). Hyperthermia generates heat to create more blood supply to the area. Because cancers have such a high rate of metabolism, when they are warmed up with far infrared heat for example, they literally over-metabolize themselves to death.
Some cancers are associated with viruses. You can make the body produce more heat shock proteins – one of the most common proteins in life on the planet, widely distributed all throughout Nature. Shock proteins were discovered when they exposed cell cultures and critters to heat shock. The body uses them to respond to all manner of stresses. They allow healthy cells to persist in the face of adversity. Some cancer cells can use it to for their own survival so it cuts both ways.