After foot surgery, swelling may occur due to the surgical trauma that affects the blood return to the veins of the lower extremities. The following treatments can be given: 1. The affected extremity should be braked and elevated to a position higher than the heart. 2. Symptomatic medications to reduce swelling, such as horse chestnut seed extract tablets, can be taken orally. 3. If swelling is obvious, drugs such as mannitol can be administered intravenously to reduce swelling. It is normal for swelling to occur in the short term after foot surgery, and it takes some time for the swelling to subside, and the swelling can be accelerated by medication. If the swelling of the foot is accompanied by typical inflammatory manifestations such as redness, swelling, heat and pain in the wound area, it is necessary to exclude whether it is caused by infection. If the swelling does not subside for a long time after surgery, the elderly should be further examined to exclude swelling caused by cardiogenic or nephrogenic diseases.