I was out in the bushes this weekend. Monday I managed to get stung hard by a hornet. Much worse than the usual flyby stinging since I was managing to squash it at the time. Don't recall seeing these before. It had a yellow jacket color pattern, but skinny with a straight rather than curved abdomen, somewhat whiter yellow and about an inch long. I didn't think that much about it at the time other than the immediate pain. Now my hand is swollen halfway up my forearm. Yea, I have a call in to my Doc to see if he wants to see me. Anyway I've never had a reaction anything like this to previous stings. So my questions are Is there something different about this variant of hornet, assuming it can be identified from my description? How often do people develop a allergy to stings, so that future stings are a serious concern?