Seizures provoked by hypoglycaemia are relatively frequent in people with type 1 diabetes. Each year, up to 15% of children with type 1 diabetes experience a severe hypoglycaemic episode, or ‘hypo’, with seizures – often as a result of administering too much insulin. But seizures also can occur during diabetic ketoacidosis – when not enough insulin has been taken. These acute complications often constitute an obstacle to diagnosis of epilepsy in people, especially children and adolescents, with diabetes. The authors of this article look at some of the links between epilepsy and type 1diabetes and report on a number of interesting findings from their recent study involving a large number of European children with type 1 diabetes.