Had you eaten a mango in the previous 12-24 hours, and touched the mango skin to your face? A few weeks ago I ate a mango, and instead of peeling it, I sliced it with the skin on and then ate it off the skin. That night I had what you are describing. It started out feeling like really chapped lips, but then the bumps appeared and it looked really weird! It took at least 4 days to fully go away, too. I'll never do that again!!! The dermatologist said that I can still eat mango, but stay away from the skin--it is related to poison ivy (or oak?)