Many parents feel reassured when their child's recurrent abdominal pain is investigated and no underlying organic condition is found. However, a study by researchers at Semmelweis University, published in the International Journal of Pediatrics, suggests that this may be when it is worth asking a few further questions: Does the child experience pain elsewhere in the body? Has the pain persisted for at least a year? If the answer to either question is yes, it may be a warning sign.