There are many reasons for patients to have lateral foot numbness, most commonly lumbar diseases, trauma, pear-shaped muscle syndrome, peripheral nerve entrapment, etc., as follows: a. Lumbar diseases: patients with lumbar disc herniation, lumbar spondylolisthesis, lumbar spinal stenosis, etc., when compressed to the spinal nerve roots, will lead to the presence of clinical symptoms of numbness on the lateral side of the patient’s foot. To make a clear diagnosis, a general X-ray of the lumbar spine, a CT of the lumbar spine and an MRI of the lumbar spine are needed to make a clear diagnosis. Second, trauma: patients with local trauma, nerve damage will lead to the presence of numbness on the lateral side of the foot clinical symptoms, the need to actively apply some nerve-nourishing drugs for treatment, three, pear-shaped muscle syndrome: patients with pear-shaped muscle syndrome, will also lead to the presence of numbness on the lateral side of the foot clinical symptoms. Fourth, the peripheral nerve compression: the peripheral nerve compression will also lead to the lateral numbness of the foot, such as the presence of the patient with the compression of the common peroneal nerve will lead to the lateral side of the foot, there are obvious symptoms of pain.