I have been very lucky and bee stings have not had any reaction for me. No welt or even redness. An hour after the sting there is not even any pain. I got stung twice this week and three days later the stings are mildly swollen and hard. They itch like crazy. My wife is worried that I am becoming sensitve to the stings and will have to give up bees. How often does sensitivity develop to the point that we would have to give up on the bees?