Help!! Not sure if I got this diving or just swimming at the beach in St Thomas USVI, but I have red blister-like bumps on the palms of my hands and they are very painful to the touch. Almost a stinging sensation when I apply pressure to them.. I have had them almost a week and I can barely grasp anything with my hands it hurts so much. Any ideas? I can attach a pic if needed. It's really weird, because it just on the palms of my hands and no where else and it has not spread. I may go to a dermatologist soon... THANKS!