A five-year-old girl in Qingdao, Shandong province, has had surgery to removes balls of hair that were taking up about two-thirds of her stomach, the Qilu Evening News reports. The unnamed girl, who often experienced stomach aches, was taken by her parents to Qingdao Women and Infant’s Hospital earlier this month. The doctors discovered the hairballs and she was diagnosed with allotriophagy, a craving to eat unusual substances. Police probe videos of Chinese woman ‘forced to eat’ the strangest things, from live fish to a prickly cactus According to a doctor, the hair stones filled about two-thirds of the girl’s stomach. “She had probably eaten her hair for six to 12 months,” the doctor said. The girl told her parents that she ate her hair when she could not fall asleep during the time for afternoon nap at her kindergarten. Another doctor said that children aged between three and six were more likely to eat unusual things and that parents should pay special attention to that.