Insufficient blood supply to the brain can cause a series of symptoms, such as numbness and weakness of the limbs, dizziness, and clumsy speech, so theoretically speaking, insufficient blood supply to the brain can cause numbness of the feet. However, from clinical experience, most numbness in the feet is most related to peripheral nerves and is commonly associated with compression symptoms such as lumbar disc herniation or diseases such as peripheral neuritis, and only accurate identification can lead to accurate medication and treatment. It is recommended that patients with long-term obvious numbness in the feet should promptly visit a hospital to improve the examination of lumbar spine MRI, head MRI and, if necessary, cerebrovascular imaging, in order to clarify the cause and eventually get effective treatment.