Two days ago I was outside when I watched a mosquito land on my arm as I was going to kill it, it bit me.. It became extremely irritated red and swollen itchy and hot.. I've never had a problem like this with mosquito's.. I cleaned it and put something to take the sting out the next day there is a red ring around it and a puss filled pimple in the center it still is very itchy and red around it as well. Now there is a slight red line going from it to up my arm and the pimple is busted leaving a hole with a raised ring around it.