Hyperglycemic crisis is life threatening condition in diabetic patients. Traditionally, diabetic ketoacidosis (DKA) has been associated with decompensated type 1 diabetes (T1D) and Hyperosmolar Hyperglycemic State (HHS) became a hallmark of type 2 diabetes (T2D). However, DKA is increasingly being reported in patients with T2D. We reported a case of DKA with some features of HHS, as an initial presentation, in a boy with unknown T2D at young age. Prompt diagnosis and acute critical care approach were very challenging to improve the outcome.