Type 2 diabetes can be asymptomatic in the early stages, or only mild thirst, fatigue, weight loss and other discomforts, and it is recommended that patients seek medical treatment in a timely manner. Patients with type 2 diabetes may not have obvious symptoms at the beginning of the disease, and most of them will find that their blood glucose increases during the physical examination. Typical symptoms of the disease are “three more and one less”, i.e., eating more, drinking more, urinating more, and losing weight, and with the development of the disease and the increase of blood glucose, the symptoms may become more obvious. In addition, patients can also be accompanied by mental depression, fatigue, anxiety and other discomforts. Long-term poor glycemic control in type 2 diabetes can lead to a variety of complications, such as diabetic nephropathy, retinopathy, vasculopathy, diabetic foot, diabetic ketoacidosis, etc., and in severe cases, can lead to end-stage renal disease, blindness, and cardiovascular disease and death. People who suspect diabetes can consult a doctor for examination and make a clear diagnosis under the guidance of a doctor.