Fasting blood glucose of 7.67 mmol/L can be diagnosed if it is combined with typical symptoms of diabetes; diabetes cannot be diagnosed if there are factors that lead to transient elevation of blood glucose, such as stress and use of medications. Diabetes mellitus can be diagnosed if fasting blood glucose of 7.67 mmol/L is combined with typical symptoms of diabetes mellitus, such as excessive drinking, excessive urination, excessive food intake, easy hunger, and weight loss. If there are no typical symptoms of diabetes, a single blood glucose value is not enough to confirm the diagnosis of diabetes, and review is recommended. Acute infection, trauma, surgery, application of hormonal drugs and other factors, can also lead to elevated blood glucose, but mostly transient, usually not diabetes. For patients with elevated blood glucose, prompt medical attention is recommended.