Insulinoma is a rare neuroendocrine tumour. It can occur at any age with nonspecific signs and symptoms. Due to its nonspecific clinical features, insulinoma may be misdiagnosed with other disorders. While evaluating a patient presenting with a seizure, toxic and metabolic causes should always be considered as they are potentially curable and can be fatal if left untreated. We describe a case of hypoglycaemia induced seizures treated as epilepsy in a patient with learning disability.