Diabetic ketoacidosis (DKA) does not necessarily mean that the pancreatic islets are not functioning. If a diabetic patient has insufficient insulin or excessive insulin-antagonizing hormones, DKA may occur, manifesting itself as hyperglycemia, ketosis, and acidosis, and belonging to a severe metabolic disorder syndrome. DKA can occur spontaneously in type 1 diabetes, and in type 2 diabetes through triggers such as infections. insulin deficiency or resistance leads to elevated blood glucose, increased lipolysis, and decreased protein synthesis and increased catabolism, resulting in the body’s production of large amounts of ketone bodies and ketoacidosis. When DKA occurs, symptoms such as dry mouth and excessive drinking and urination may worsen, and there may be nausea, vomiting, drowsiness, a rotten apple odor on exhalation, and coma in severe cases. It is important to go to the hospital in time and actively diagnose and treat the disease under the guidance of the doctor in order to avoid delaying the condition.