If the swelling of the foot and calf is unilateral, especially if there is trauma, it may be a local soft tissue injury swelling, or it may be a serious injury such as fracture dislocation. If there is a fracture or dislocation, timely repositioning and proper fixation will help to reduce the swelling. If there is no trauma, the swelling of the calf and foot may be caused by deep vein thrombosis. In this case, it can be determined by vascular ultrasound, and after determining the thrombosis, it can be treated with blood clotting therapy such as thromboplasty, and anticoagulation therapy such as rivaroxaban. In case of bilateral swelling of feet and calves, it may be due to poor heart function, the presence of right heart failure, or hypoproteinemia, etc. Usually there is a history of chronic lung or liver disease, which can be determined by cardiac ultrasound, B-type brain natriuretic peptide and liver function measurement, which can help to determine.