Calf belly soreness, may be related to physiological factors, may also be lower extremity vascular lesions, hypocalcemia, lumbar lesions and other pathological factors. 1. Physiological factors: for example, usually lack of exercise, sudden strenuous exercise, resulting in the accumulation of lactic acid in the legs, may cause calf belly soreness, may also be accompanied by leg weakness and other performance. 2. Lower extremity vascular lesions: such as lower extremity varicose veins, lower extremity phlebitis, lower extremity deep vein thrombosis, etc., can lead to lower extremity venous reflux is not smooth, may cause calf belly pain, may also be accompanied by lower extremity heaviness, fatigue and other performance. 3. Hypocalcemia: because of low calcium content in the body, resulting in increased muscle nerve excitability, resulting in frequent leg cramps, which may cause calf pain. 4. Lumbar lesions: such as lumbar spinal stenosis, lumbar intervertebral disc herniation, etc., may lead to localized nerve root compression, resulting in sensory impairment of the innervated part of the compressed nerve, which may cause calf pain, may be accompanied by radiating pain in the legs, numbness and other symptoms. Calf belly pain, may also be caused by other reasons, if the symptoms continue to get better, it is recommended to go to the hospital as soon as possible, after a clear diagnosis of the cause, to give targeted treatment.