Celiac disease is a reaction to eating gluten, a protein found in wheat, barley and rye. Eating gluten triggers an immune response in the small intestine. Over time, this reaction damages the intestine and prevents absorption of some nutrients. There is no cure for this reaction. Following a gluten-free diet helps manage symptoms, that are different in children and adults. In children, they can be vomiting, diarrhoea, poor appetite, irritability or short stature. Adults can present symptoms like fatigue, diarrhoea and gas, abdominal pain, nausea, anaemia, skin rash, mouth ulcers, numbness in the feet and hand, etc.