Generally, diabetic patients will not have weak legs. If they have weak legs, they may be found in the following situations. First, diabetic patients have hypoglycemia; Second, diabetic patients have peripheral neuropathy; Third, diabetic patients have cerebrovascular diseases. It is recommended to go to the hospital first to find out the cause and then to treat symptomatically. Diabetes is a group of metabolic diseases characterized by chronic hyperglycemia caused by multiple causes. It is caused by insulin secretion and/or utilization defects. Long term carbohydrate, fat and protein metabolism disorders can cause multiple system damage, leading to chronic progressive lesions, dysfunction and failure of eyes, kidneys, nerves, heart, blood vessels and other tissues and organs.