My 14-month old has terrible reactions to mosquito bites -- as did his parents when they were little. I once ended up in the hospital because of an allergic reaction. The other day he had a couple bites on his legs and I got a call from daycare saying he was covered with a rash and was wheezing. His legs and arms were covered with hives. Dr. prescribed zyrtec and within MINUTES the hives were gone and the bites disappeared. I've also noticed that when I dip his legs in the lake that swelling from his bites really go down. Must be the cool water, so cool compresses would work too.