Calf hamstring pain can be caused by physiological reasons such as excessive exercise intensity and cold, or it can be caused by pathologic factors such as lumbar disc herniation and sciatic nerve compression. 1. Physiological reasons: the calf part of the flounder muscle, gastrocnemius muscle and other muscle groups exist, the tendon membrane of the muscle extends downward to form the Achilles tendon attached to the heel bone, if the amount of exercise is relatively large or exercise for a longer period of time, which may cause these soft tissue parts of the fatigue, resulting in the symptoms of calf hamstring pain. In addition, long-term cold stimulation of the calf area, may also appear the above symptoms. 2. Pathological factors: lumbar intervertebral disc herniation due to dehydration of the lumbar intervertebral disc, the nucleus pulposus may protrude backward or sideways and backward, causing the nerve innervating the soft tissues of the calf to be compressed, and the symptom of calf hamstring pain may occur; the sciatic nerve may also appear when it is stimulated by excessive pulling or compression, such as pyriformis syndrome and sciatic neuritis, and so on. Calf hamstring pain may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.