It is usually not clear how high blood glucose can cause elevated ketone bodies. In general blood glucose higher than 16.7 mmol/L may be combined with diabetic ketoacidosis, resulting in elevated ketone bodies, but there are cases where blood glucose is not high enough to be combined with ketones, so it is advisable to consult a doctor. The appearance of ketone bodies is not caused by blood glucose, but by lipolysis. When insulin is insufficient or glucose is in short supply, resulting in blood sugar not being broken down and utilized efficiently, it causes the breakdown of body fat and the production of ketone bodies. Ketosis associated with elevated blood glucose is more common, especially in type 1 diabetes, where diabetic ketoacidosis may occur with blood glucose higher than 16.7 mmol/L. Ketosis can also occur due to fasting, heavy pregnancy reactions, and severe starvation states, although blood glucose can be normal or low, due to glucose insufficiency, leading to the use of lipolysis for energy and the production of ketone bodies. So there is no obvious relationship between high and low blood glucose and whether ketone bodies are high or not, there are ketone bodies or any discomfort should promptly go to the hospital, under the guidance of the doctor, to avoid delaying the condition.