glbirch
Contributor
Two weeks ago in Cozumel, I took a hit from a jellyfish or something across the back of my hand. Immediate reaction, swelling, redness, pain, etc, lasted a couple of hours then faded away. But a week later back home the back of my hand erupted again in the same place with red welts that are taking days to fade away. Some research suggests that this is not unheard of. What I'm wondering is; first, is this a common occurence? And second, why does it happen? What would cause a reaction days after the initial sting?