Ok, a little girl that I babysit for has a big spider bite about a dime size bite a few inches from her groin, it has little white spots on top, like a pimple would but like 10 of them, it is extremely painful and is bright red with a "moon dog" around it about the size of a palm that is also red and hard to the touch. I gave her benedryl and I was going to put a little baking soda and water on it too. What else can I do I called her mom and told her I thought she needed to go to the doctor.