Ongoing diarrhea or constipation
Bloating or abdominal pain
Gas
Nausea or vomiting
Unexplained weight loss
Fatigue
Iron-deficiency anemia
Mouth ulcers
Skin rash with itchy blisters
Headaches
Joint pain
Numbness or tingling in hands or feet
Delayed growth or puberty in children
Poor bone density or frequent fractures
Symptoms that improve when avoiding gluten and return when eating it
Family history of celiac disease
Positive celiac blood tests
Confirmed diagnosis by intestinal biopsy while eating gluten