The soreness and pain in the calves at night is commonly caused by overstrain, lumbar disc herniation and pear-shaped muscle syndrome, etc. The details are as follows: 1. Overstrain: prolonged standing work or strenuous exercise can lead to serious strain on the calf muscles, and patients will show excessive accumulation of acidic metabolites in the muscles, which will cause local soreness and pain at night rest, accompanied by local pain. 2, lumbar disc herniation and pear-shaped muscle syndrome, etc.: can stimulate the nerve roots and sciatic nerve, so that patients at night when the calf soreness, pain and other symptoms, usually occur in the early stage of the lesion, while the late stage will be manifested as a severe and continuous pain in the calf, while the patient will have lumbar spine activity restrictions. The location and severity of the lumbar spine lesion can be detected by MRI, and early treatment can relieve the symptoms of soreness and pain in the lower leg.