Swelling after a foot fracture is a very normal clinical symptom, the main reasons are reflected in the following aspects: 1, the fracture will bleed at the broken end of the fracture, and the bleeding and the outside world is not connected, it will be wrapped up in the inside to cause obvious swelling. 2, the fracture will be subjected to a great deal of violence, in addition to the fracture itself, the muscles around the fracture of the soft tissues and the tissues of the blood vessels are subjected to serious damage, the local blood The circulatory system is seriously affected, the venous return is not good, there will also be very obvious swelling. These swellings are a temporary clinical manifestation of the fracture and will gradually return to normal after systematic treatment and recovery. In severe soft tissue injuries, it takes about 0.5-1 year for the swelling to gradually subside. For mild soft tissue injuries, the swelling takes about 3 months.