hello I read your question and understand your concern I would like to ask that * is your daughter willingly practise to reduce weight? I mean is she weight conscious? * along with such practise is she doing excessive exercise too? * any voluntary effort of doing vomiting? in my opinion she is suffering from Anorexea Nervosa and voluntary effort to reduce her weight so I would suggest to check her with some good doctor and also do her blood test even for H.pylori and other blood tests I hope my answer will satisfy you good luck & tc