How is the numbness on the palm side of the foot? Mainly consider the following aspects: first, half of the palm of the foot numbness should ask the patient half of the palm of the foot side numbness whether there is weakness on the side of the palm of the foot, numbness has not radiated to the lower leg? The patient should also be asked if there is a history of lumbosacral surgery, some patients with lumbosacral diseases have a history of surgery, such as perianal abscesses that can easily damage the sacrococcygeal nerves, the numbness of the hemipalmus, the need to do lumbar spine MRI and electromyography to understand whether there is a lumbosacral lesion. The second, half of the palm side of the numbness should be asked whether the patient has diabetes, there are some patients with diabetic peripheral neuropathy, easy to appear diabetic mononeuropathy of peripheral nerve changes, manifested as half of the palm side of the numbness, need to measure blood sugar and electromyography to clarify. The third, half of the palm side of the numbness should be asked whether the patient has foot trauma, such as ankle fracture, ankle fracture compression nerve is also prone to half of the palm side of the numbness.