 [ Symptoms ] my two year old has had diarrhea for at least 6 months three doctors we have seen are not worried i am please help  her weight went from being in the 75th percentile at age 18 months to less than the 10th percentile at age two she has diarrhea all day every day to be honest i do not think she has ever had a normal bowel movement her whole life [ Disease ] has the dr  is tested for wheat or gluten intollerance if possible have a separate test done for wheat and a separate test done for gluten you can have the intollerance for one and not the other is your child lactose intollerant have anemia or thyroid condition you can research for celiac sprue disease for more information and clues celiac is an intollerance to both hope this helps