Her first two laser hair-removal sessions went smoothly, but the third ended with burning pain that persisted for weeks, a 26-year-old Brooklyn woman recalled. Then the marks appeared: long red stripes along the backs of her legs. Over the next few months, the stripes turned dark brown.
“It was horrifying,” said the woman, who asked not to be identified in order to preserve her privacy. “It wasn’t something you would see on a normal person.”
