During a very relaxing and calmin yoga session last week, I managed to lie down on a wasp and get stung at the top of my thigh. Hurt pretty bad at the time, but not unmanageable. Then after a day or two the pain went away and I forgot about it. Now it seems to have flared up again, a week later. Why?? It is red, hot and itching like mad. Cortisone cream seems to stop the itching for a couple of hours, but isn't making it look any better and the itching just comes back with a vengeance once the cream wears off. Any good suggestions for how to treat it? It's driving me bonkers!