Ischemic pain is pain that results from a poor blood supply to a limb or organ. For example, thrombotic vasculitis of the femoral artery in the left lower extremity leads to an inadequate blood supply to the left lower leg, producing severe pain. This type of disease is sometimes easy to diagnose, such as the disease above, which can be confirmed with a single vascular ultrasound. However, some diseases are very insidious and not easily diagnosed. An example: diabetic foot. Some diabetic patients have pain in the lower extremities and ulcers that do not heal over time. It is commonly thought that this is due to the slow healing of the body caused by diabetes, but it is not known that the real reason is that diabetes leads to impaired microcirculation in the limb, which causes pain and poor tissue healing due to insufficient blood supply. This microcirculatory disorder is not detected by vascular ultrasound. Ischemic pain can be treated with thrombolysis if there is a clear thrombosis. However, if there is no definite thrombosis and the main manifestation is only microcirculatory disorders, there has been a lack of good solutions until the advent of spinal cord electrical stimulation. Spinal cord electrical stimulation is a minimally invasive technique in which an electrode is implanted in the back of the spinal cord, through which a weak electric current is generated to stimulate the dorsal horn neurons of the spinal cord and inhibit the uploading of pain; at the same time, sympathetic nerve function is inhibited and blood vessels are dilated, thus achieving both the primary and secondary treatment of improving circulation and relieving pain. This technology has been carried out in Europe and the United States since the 1990s, and more than 10,000 cases have been performed so far, but it has only been a short time since it entered China.