my dd2 has a bad reaction to mozzies. she got one on her finger and i thought her skin might actually burst it was so huge. the doc (yes i took her to the doc) just said anti histamine and unless she showed any other signs of reaction other than just skin swelling that it was just something shed have to deal with and probably grow out of a bit. but they last for weeks and go lumpy after about 5 days and blister up!! poor chicken! she got about 10 bites on her feet a few months ago and couldnt sleep for weeks, would wake up crying ever hour!! make mozzy repellent your friend!! i have a good tea tree based one (not deet!!).