How do you cure Burning legs?

I went swimming today in a saltwater pool and when I got out my legs were fire red and burning like crazy. I figured I just needed to wash off the salt water so I went straight home and took a shower thinking the fresh water would help the burning, but it didn't. I tried to put Aloe, unscented lotion, and even Vaseline on my legs to see what would relive me, and the plain Vaseline took some of the burning away but not much. I thought maybe the burning was because I shaved my legs before going to the pool but last weekend I was at the beach and shaved my legs before going out in the ocean and didn't have this problem. I need help though very badly. the pain is almost unbearable!! Thank you for any help.