I keep chewable Claritin tablets with me at all times just for this reason. I haven't gotten any in a while, but I have gotten ant bites on the tops of my feet, kind of where your ankle meets your foot. I get a large (not huge) flat purple welt, and about 2" around it I get a purple discoloration that looks like a bruise and is hot to the touch. they also itch and take ages to go away. As soon as any one of us gets a bite other than a mosquito bite, I give them or I pop a chewable Claritin.