The causes of numbness on the soles of the feet in the elderly include sciatica, intracranial diseases, diabetic peripheral neuropathy, and spinal cord diseases. 1. Sciatica. This disease includes lumbar intervertebral disc herniation, lumbar spinal stenosis, sacroiliac arthropathy and so on. The onset of the symptoms of numbness on the soles of the feet due to sciatic nerve compression. Diagnosis is confirmed by lumbar spine CT or MRI. 2. Intracranial diseases. Including cerebral hemorrhage, cerebral infarction, intracranial malignant tumors and so on. At the onset of brain cell damage, numbness of the soles of the feet, often accompanied by slurred speech, crooked mouth and eyes, limb numbness and unfavorable. Diagnosis can be confirmed by head CT or MRI. 3. Diabetic peripheral neuropathy. It is mainly caused by the patient’s increased blood sugar and damage to the peripheral nerves. Symptoms such as numbness on the soles of the feet occur at the onset. Diagnosis is confirmed by fasting blood glucose, nerve electrophysiology and other tests. 4. Spinal cord disease. Including spinal cord cavity, spinal cord trauma. After the onset of the disease, motor dysfunction, sensory dysfunction, autonomic dysfunction, etc. can occur below the injured segment, and the patient may feel numbness of the soles of the feet and other symptoms. If the elderly have numbness of the soles of the feet, it is recommended to go to the hospital outpatient clinic as soon as possible to clarify the cause of the disease.