Final answer:
Recurrent hypoglycemia in children with T1DM may be due to hyperinsulinism, possibly caused by pancreatic tumors, and it often indicates that the insulin therapy dose may be excessive and might need adjustment.
Step-by-step explanation:
Unexplained episodes of recurrent hypoglycemia in children with Type 1 Diabetes Mellitus (T1DM) may be due to the excessive production of insulin, which can occur due to a condition known as hyperinsulinism. Possible causes of hyperinsulinism include pancreatic tumors of the β-cells. These episodes could be indicating that the insulin dose for treatment of diabetes mellitus is more than necessary and needs adjustment. During insulin therapy, it's essential to monitor blood glucose levels to prevent severe hypoglycemia.