Chinese media recently reported the unusual case of a girl who reached puberty at age seven, presumably because of sleeping with the lights on every night for the last three years.
At age 7, Dandan (pseudonym) is already 1.20m-tall, towering over most girls her age. When she first started growing, her mother was delighted, and didn’t even stop to wonder why the girl had grown by about 10 cm in a single year. It wasn’t until one day, when she was giving Dandan a bath, and she noticed that she had developed breasts, that the woman realized something was wrong. She took the 7-year-old to the hospital and was shocked to learn that her daughter had reached puberty at least three years earlier than usual.