First step: Start with hot water and splash the area with the bites till you feel nice and warm.
step two: Change the temperature on the faucet to mildly cold and submerge affected area till you start to feel goosebumps or till itching stops.
You may have to repeat after a few hours as effects of the bath can vary in times. Typically do this at night while your about to go to sleep as scratching can make it itch more.
Article contributed by terr6forma. If other contributed first, please pm me so I can give credit.