This is probably the greatest sequence of photos I have ever seen where someone slowly goes from normal looking teenager (with a new hair color) to Sloth from Goonies. We're not sure what the end result is from this kid. It was posted on Reddit under the title "My Friend's Little Brother Had An Allergic Reaction To Hair Dye", which makes us assume that everything turned out alright. It looks like he had a pretty good sense of humor about his head exploding to twice its normal size.
H/T Reddit
