The dangers of diabetes are as follows: First, high blood sugar can easily lead to acute complications of diabetes, such as diabetic ketoacidosis and hyperosmolar coma, which may affect patients’ lives and require timely treatment. Second, high blood sugar can easily induce infections in the respiratory and urinary tracts, leading to slow wound healing or even non-healing. Third, long-term chronic hyperglycemia can affect cardiovascular and cerebrovascular diseases, such as cerebral infarction, coronary artery disease, angina pectoris, myocardial infarction, etc. Fourth, easy to complicate diabetic nephropathy, diabetic fundopathy, resulting in renal insufficiency, even dialysis, blindness, etc. Fifth, diabetic neurological complications, affecting the central nerve, peripheral nerve, cranial nerve, plant nerve, etc., leading to hyperalgesia or pain hypersensitivity, nerve paralysis and other symptoms. Sixth, it triggers diabetic foot, and even requires amputation.