Teenage girls who lose an alarming amount of weight are often diagnosed with eating disorders. But there is  a rare condition that makes digesting food too painful to eat. A teenager's eating habits can be frustrating for parents. But what if your child started complaining that food was causing them pain - so much so that they didn't want to eat and started losing weight ? .That's what happened to Miss Tanya (name changed) – a 15 year old teenager – a permanent resident of Belgium .

Her father ran from pillar to post in all hospitals in Europe and UK – but no diagnosis was forthcoming .Her  symptoms continued to stump the Western doctors. " It was just so painful to eat that I couldn't do it," said Tanya ."I would be at lunch and have half a sandwich  I would feel really sick ," she said . Even the smallest of meals would cause severe abdominal pain. Everything from heartburn to…