High blood sugar causes swelling of the legs and feet, may be to the extent that diabetic nephropathy, diabetic peripheral neuropathy and other complications have occurred, or the emergence of heart disease, indicating that poor control of blood glucose , is a more serious degree. Patients with high blood sugar in poor blood sugar control, longer history of the disease, easy to lead to the occurrence of diabetic nephropathy, diabetic peripheral neuropathy, will lead to the body’s blood circulation is impaired, the emergence of hypoproteinemia, the microvascular and peripheral nerves of the lower extremities are damaged, resulting in swelling of the legs and feet. This indicates that the condition of diabetes is more serious, and treatment should be taken in a timely manner. High blood sugar swelling of the legs and feet, but also to consider whether due to the existence of coronary heart disease, cardiac insufficiency and other diseases lead to the patient’s body circulation stagnation, and the emergence of the swelling of the legs and feet. High blood sugar caused by leg and foot swelling, it is recommended to go to the hospital in time, pay attention to control blood sugar stabilization.