Addison's disease in type 1 diabetes presenting with recurrent hypoglycaemia

Primary adrenal insufficiency (Addison's disease) often develops insidiousl y. Although a rare disorder, it is more common in type 1 diabetes mellitus. A 19 year old male with type 1 diabetes and autoimmune hypothyroidism expe rienced recurrent severe hypoglycaemia over several months, despite a reduc tion in insulin dose, culminating in an adrenal crisis. Recurrent severe hy poglycaemia resolved after identification and treatment of the after identi fication ana treatment or the adrenocortical insufficiency. In type 1 diabe tes, undiagnosed Addison's disease can influence glycaemic control and indu ce severe hypoglycaemia.