Diabetic foot numbness may be related to diabetic neuropathy, lumbar spondylosis, diabetic vasculopathy, etc. It is recommended to do electromyography, lower limb vascular ultrasound, glycated hemoglobin and other tests under the guidance of the doctor. 1. Electromyography: refers to the muscle bioelectricity graph recorded by electromyography. It is important for evaluating a person’s activity in the human-machine system. The functional status of peripheral nerves, neurons, neuromuscular junctions and muscles themselves can be determined by this examination. 2. Lower extremity vascular ultrasound: Used for ultrasound imaging, measurement and blood flow motion information acquisition for clinical ultrasound diagnostic examination. Using ultrasound Doppler technology and ultrasound echo principle, it can simultaneously collect blood flow movement, tissue movement information and human organ tissue imaging. 3. Glycosylated hemoglobin: Glycosylated hemoglobin is the product of a non-enzymatic reaction between hemoglobin in red blood cells and sugars (mainly glucose) in serum. Glycated hemoglobin concentration can effectively reflect the average blood glucose level in the past 8~12 weeks. The symptoms of diabetic foot numbness alone can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of a doctor.