You’re cooking dinner, and the water you’ve got on the stove starts to boil over, so you reach out to turn it down. In doing so, some of the water splashes on your arm. Immediately, you notice that it hurts. Quickly, you run some cool water over the area. It feels a little better but is still red. You’ve been burned, but how bad is it? Do you need to go to the doctor? What should you do to treat it?