A fracture of the foot can produce symptoms of swelling on the top of the foot, or even the entire dorsum of the foot. This is usually due to obstruction of blood flow, exudation of inflammatory factors, and a sudden increase in the resistance to venous blood return. 1. Obstruction of blood flow: damaged blood vessels rupture and bleed after fracture, or muscle spasm caused by pain or reflexes, resulting in venous and lymphatic blockage and obstruction of return flow, leading to swelling. 2. Exudation of inflammatory factors: Inflammatory factors that accumulate at the fracture site cause an imbalance in fluid exchange inside and outside the blood vessels, so that fluid over-permeates the tissue spaces, which in turn leads to swelling of the foot. 3. Sudden increase in venous resistance to blood return: Since a patient with a foot fracture needs to rest in bed for a long time, the resistance to venous return is lower than when standing. As the patient needs to stand and walk gradually after recovery from the fracture, it is more difficult for the blood vessels to adapt to the sudden increase in venous blood return resistance, and therefore swelling of the foot surface may also occur. Proper exercise, including plyometrics as well as joint mobilization, should be performed as prescribed by the doctor after fracture recovery to promote blood flow and swelling.