If we talk about the most common symptom of early-stage diabetes, it includes dry mouth, excessive drinking, overeating, frequent urination, and weight loss. These are the most common symptoms characterized as "three excessive and one deficient" behaviors. Additionally, some patients with early-stage diabetes may not exhibit the aforementioned symptoms. They might experience blurred vision, itchy skin throughout the body, difficulty in healing wounds, overall numbness and fatigue, as well as poor mental and appetite health when they seek medical attention. When blood sugar levels are very high, the symptoms of "three excessive and one deficient" mentioned above can appear. Many diabetic patients in the early stages do not show any symptoms, such as patients who need surgery and are then found to have high blood sugar but no symptoms initially, coupled with increased blood sugar levels. Therefore, patients with early-stage diabetes might not have any symptoms, but those undergoing physical examination should regularly monitor their blood sugar levels, including both fasting and postprandial blood sugar.