Coeliac disease is an autoimmune disease, it occurs when the body reacts to a protein in gluten. To make the diagnosis requires first an antibody blood test. Some children may then require a gastroscopy or more blood tests to further check for the presence of antibodies. If the diagnosis is made by your specialist, it is important to adhere to a strict gluten free diet. Seeing a dietitian can be helpful to clarify queries and Coeliac Australia (www.coeliac.org.au) is a useful resource.