The main causes of calf tummy pain are related to sports injuries, overexertion, inflammation or neurological lesions. 1. Sports strain: usually in the process of exercise, if the excessive force leads to the calf tummy area muscle soft tissue strain, easy to trigger the symptoms of calf tummy pain. 2. overwork: if long time weight bearing activities or strenuous exercise, the calf stomach muscle frequent contraction, easy to produce a feeling of fatigue, which will trigger the performance of pain. 3. Inflammation: If inflammation occurs in the calf tummy area, such as fasciitis, the stimulation of inflammation is likely to trigger local pain symptoms, and even accompanied by swelling. 4. Neurological lesions: when there is a lower extremity peripheral nerve injury or lumbar spine structure changes, compression of the nerve root, easily triggered by the calf tummy area of radiating pain in the sensory abnormal symptoms. If the symptoms of calf tummy pain is more serious and lasts for a longer period of time, it is necessary to target treatment under the guidance of a professional physician. Before the pain is not relieved do not prematurely strenuous exercise, otherwise it is easy to lead to the aggravation of the symptoms.