After 6 months of fracture, walking now always feel the calf muscle inward tightness may be the recovery process of tissue fiber proliferation, venous thrombosis, arterial embolism and so on. 1. Tissue fiber hyperplasia: It may be caused by the proliferation of tissue fibers during the process of tissue self-repair during the recovery period of the patient, which is a normal phenomenon. 2. Venous thrombosis: venous thrombosis is caused by slow blood flow, hypercoagulation and other factors, the patient after the fracture surgery for a long time in bed without exercise, easy to make the leg venous thrombosis phenomenon. 3. Arterial embolism: most of the arterial embolism is caused by atherosclerosis, the patient’s blood clots will block the leg veins or arteries after dislodging, which will cause tightness in the calf muscles. Fracture patients in the fracture 6 months after walking now feel the symptoms of calf muscle inward tightness, should be timely to the hospital, follow the doctor’s instructions for treatment.