Swelling can occur after a thigh fracture for several reasons: 1. local inflammation and swelling due to injury; 2. poor venous return; 3. bed rest after the fracture, the muscles cannot play a normal role in reducing swelling, so swelling can occur. Swelling can be eliminated 80% in 0.5 months after surgery, and the remaining 20% of swelling may take several months. Some people recover in 1-2 months, some people recover in 3-4 months, and some people even come to the hospital for review in 6-12 months without swelling reduction, these situations exist. You can use anti-swelling drugs to promote the elimination of swelling, and usually exercise the muscles of the lower limbs to promote the swelling to subside, these are helpful.