Calf belly pressure pain may be caused by physiological factors, such as lactic acid accumulation, etc., may also be caused by pathological factors, such as tibial osteochondritis, fasciitis, etc.. 1. Lactic acid buildup: when there is no timely muscle relaxation after strenuous exercise, it is possible that frequent contraction of the leg muscles may lead to excessive muscle fatigue and localized accumulation of lactic acid and other metabolites, resulting in pain in the calf when pressed. 2. Tibial osteochondritis: If you perform high-intensity exercise all year round, or suddenly increase the amount of exercise, it may cause stress osteochondritis. Due to frequent muscle pulling during exercise, the periosteum produces tiny tears and inflammatory changes, which in turn lead to symptoms of calf belly pain on pressure. 3. Fasciitis: If excessive stretching of calf muscles such as gastrocnemius muscle, resulting in cumulative strain injury, may lead to myofascial attachment in the position of the bone aseptic inflammation, which in turn triggers pain. In addition to the above reasons, thrombophlebitis, fractures, etc. may also lead to calf belly pressure pain. If the pain is difficult to relieve itself, it is recommended to consult a doctor and take appropriate treatment according to the cause.