These are much worse than mosquitoes. Unlike the latter, gnats slice off a patch of your skin. On Wendesday I got bitten by some during the trip to the hills, and my arms are still swollen and it still itches three days later. The all-knowing Alexandra says these will last about a week. One of the worse thing about gnats is they don’t really hurt when they initially attack you. ALWAYS WEAR LONG-SLEEVED SHIRT TO THE WOODS AND TAKE SOME INSECT-REPELLANT WITH YOU!!