A teenager's head grew to twice its size after she suffered a severe allergic reaction to a hair dye that left her struggling to breathe.
Estelle, a 19-year-old English student from Paris, suffered a disfigurement caused by the chemical PPD, which is found in 90 percent of hair dyes.
Estelle, who shared photos of her swollen head on social media, says she had bought a standard hair dye from a supermarket in Val-de-Marne, on the outskirts of Paris. After applying it, she reacted to it.