Glucocorticoid use in patients with autoimmune bullous disease is associated with significant morbidity, and in some cases, excess mortality. The hyperglycaemic complications arising from glucocorticoid use have been well-documented and range from mild hyperglycaemia to diabetic ketoacidosis. Patients with pre-existing glucose intolerance or type 2 diabetes mellitus are at increased risk of developing complications. Several other factors have been investigated for their association with steroid-induced hyperglycaemia, including patient age, gender, family history, dose, regimen and duration of therapy. Findings in the current literature, however, are largely conflicting and evidence is limited by methodological weaknesses. Glucocorticoids should be used with caution, and steroid-using patients should be closely monitored for adverse effects.