My daughter suffered with severe constipation from age 3 and was misdiagnosed with all kinds of things, the lastest irritable bowel with constipation. She also has exercise induced asthma.By chance at age 17 someone suggested she give up gluten in her diet. The constipation went away, she felt wonderful. Her asthma was much less severe. She will be 19 this summer and still gluten free and feeling great. Don't let her suffer. Have her tested BEFORE you try giving up gluten as she has to have it in her system to get a proper diagnosis. If she gives it up first and feels better it is incredibly painful to go back on it for testing.