Or should I say when one is pregnant and gets bitten by a mosquito one swells. This is a tame version what my mosquito bites looked like on my feet after our trip to the lake on the long weekend. I don't recall every reacting to mosquito bites. Yes, they get itchy and red but never do they swell up. The picture shows one at a "normal" reaction size and one at about the size the others were the day before - although they also went a white tone rather then red as in the photo. My other foot had about 3 or 4 or these beauties. Isn't being pregnant an experience!