Swelling of the foot after removing the cast of calf fracture is usually a normal phenomenon, which can be dealt with by general treatment, medication and symptomatic treatment of other diseases. 1. General treatment: As the plaster compresses the local tissues, it can lead to the obstruction of blood return, which can be achieved by elevating the calf to promote the return of blood to reduce the swelling; it can be used to apply hot compresses locally, such as hot towels and hot salt bags to promote blood circulation and reduce the swelling, and it should be noted that the temperature should be avoided to be too high for too long, and it will cause burns. 2. Medication: Furosemide and hydrochlorothiazide can be used as prescribed by the doctor for diuresis and elimination of edema. 3. Treatment of causes: other diseases cause swelling of the feet, such as lower extremity venous embolism, ultrasound examination to confirm the diagnosis can be anticoagulation, thrombolysis, surgical removal of thrombus treatment, systemic diseases such as cardiogenic diseases, renal diseases, allergies and other causes, it is necessary to treat the primary cause of the disease, such as antiallergic way of treatment. If the foot is swollen after removing the cast of the fracture of the lower leg, please go to the hospital in time for diagnosis and treatment, and actively treat it, and do not use medication privately, which may cause danger.