Don't you hate getting annoying mosquito bites in the summer. Well here's a nifty trick. Next time you get bitten, place a hot (read as stirred in coffee hot, not stove temperature) and place it over the bite area. The heat denatures the 'itchy proteins' and basically will stop the mark from itching later.
The explanation is when you get bitten, mosquitos inject an anti-coagulant that stops your blood from clotting. This protein can't survive high temperatures, so that's why this trick works. The bump may last a few hours/days, but at least the irritation won't!