Learn from my mistake! I’ve heard about this happening before but of course didn’t think about it in the moment - last weekend we let my daughter suck on a lime wedge & happened to be outside. I’m super paranoid about her being in the sun so it couldn’t have been that much exposure but a chemical in lime juice mixed with sun causes a burn 😩 we’ve been putting aquaphor on it daily & thank goodness it doesn’t seem to bother her AT ALL. Just wanted to share in case it helps anyone!