Calf tendon pain may be due to excessive exercise, soft tissue strains and other physiological causes, but also may be caused by lumbar diseases, lower extremity vascular diseases and other pathological factors. 1. Physiological reasons: the tendons in the calf area generally refer to the posterior muscle groups of the calf, such as gastrocnemius, flounder muscle, etc. If you exercise for a long time or for a long period of time, you may not be able to exercise. Normally, if the amount of exercise is relatively large or the people who exercise for a long time, there may be micro-injuries to the muscles at the back of the calf, causing aseptic inflammation to stimulate the nerve root, and pain symptoms; insufficient warm-up, the muscle’s sudden force may cause muscle strain, and the above symptoms may also occur. 2. Pathological factors: lumbar diseases can produce pressure on the nerve tissues innervating the calf area and the symptoms of calf tendon pain. Such as lumbar disc herniation, spinal stenosis, etc.; lower extremity vascular disease, may cause lower extremity venous stasis, and the veins contain a large number of metabolites, stimulation of peripheral nerves may also appear after the above symptoms, such as varicose veins of the lower extremities, thrombotic occlusive vasculitis, etc.. The symptoms of calf tendon pain alone sometimes can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of a doctor.