The most common reason for maintaining pain after calf cramps is neuralgia caused by nerve compression due to lumbar disc herniation in clinical practice, which generally manifests as involvement pain, radiating pain, discharge-like pain, most commonly due to lumbar four and five disc herniation or lumbar five sacral one disc herniation, which compress lumbar five nerve roots and sacral one nerve roots, respectively, because the area mainly innervated by sacral one nerve roots is on the posterior side of the calf, which is the area of the gastrocnemius muscle. Radioactive pain or throbbing in the muscles of the innervated area occurs because the compression of the herniated lumbar disc is not released, so it will continue to attack. With the prolongation of time, the pain may become more and more painful, and even numbness and muscle strength may appear, which means that the activity is limited and walking is difficult. At this time, CT examination and MRI examination of the lumbar spine are often required to clarify the cause and treat the disease symptomatically.