Allergic reaction to what?

While I was at Disneyland, I got a little sun..... a little too much sun. Nothing serious, just a little pink on the arms and face. So for the past few days I've been putting aleo vera juice on it (yes, juice.. cause we don't have any gel currently). Well tonight I put it on, same as always, and all of the sudden I start turning red everywhere I had put it! Quite promptly I washed it off, and it's slowly going away now.... Slightly itches, but not too bad.. and the skin isn't raised, just red. But what on earth!?!? This has never happened before.... Maybe it's because of the remedy? *shrug* Well whatever the reason, I really hope this clears up quick, cause I'm tired and need some good rest.