Early detection of diabetes and active control can reduce the occurrence of complications. When one of the following conditions is present, you should be alerted, and promptly go to the hospital and test various indicators such as blood sugar to make a clear diagnosis. 1.Weight loss without obvious reasons. Especially those who are obese and have no special changes in diet and continue to lose weight. 2.Patients with diabetes in the family. 3. Those who have delivered a huge fetus weighing more than 4,000 grams; or have pregnancy complications such as multiple miscarriages, excessive amniotic fluid, etc. 4.Persons with reactive hypoglycemia. 5.Persons with persistent limb ulcers. 6. Obese people.