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Celiac Disease

Mayo Clinic Q&A: Diagnosing celiac disease not always a one-step process

DEAR MAYO CLINIC: My blood test for celiac disease came back negative, but I'm still having symptoms. Is it possible that I still could have it? What should my next steps be?

ANSWER: The symptoms and presentation of celiac disease can vary quite a bit from one person to another. The most common symptoms are bloating and weight loss. Diarrhea or constipation may also affect some people. Less commonly, patients may experience an itchy, burning rash, called dermatitis herpetiformis, as well as heartburn, headaches, fatigue and joint pain, among others.

Celiac disease may also cause iron deficiency anemia and neuropathy -- tingling or pain in the feet and hands that doesn't go...