Not likely....When i shit winny in my tri-s they sweel up and get really hot..stays swollen for a day or two, weird, a couple other fellas have also.....Take some benadryl it might help with the swelling if it was something allergic if not wait and see if it gets worse than go to the doc and tell him you had a mosquito bit and kept scratching it....That happened to me once, i had a mosquito bite on my shin and was scratching it with the heel of my sneaker....WOW.....I got Cellulits really bad, my whole shin and calf sweled up like a ballon.....Zithromax cleard it up