Life threatening hypoglycaemia due to previously unrecognised coeliac disease in a patient with type 1 diabetes mellitus

Coeliac disease is currently recognised to be associated with type 1 diabetes mellitus. However, the presentation varies. We report a patient with long‐standing type 1 diabetes presenting to us with life‐threatening hypoglycaemia for two years before the coexistence of coeliac disease was recognised. Following dietary intervention, her symptoms and life style improved remarkably. We conclude that any unexplained hypoglycaemia in a patient with type 1 diabetes mellitus should make us think of coexisting coeliac disease.