The treatment of swollen and painful knees after a fall includes hot and cold compresses, physical therapy, medication, and surgery. 1. Hot and cold compresses: after a fall, it will lead to soft tissue damage and localized redness, swelling, heat and pain, ice can be applied within 72 hours, and hot compresses can be applied after 72 hours. 2. Physical therapy: appropriate physical therapy can be carried out to promote soft tissue repair, such as acupuncture, baking electricity. 3. Medication: local unbroken after the fall, minor injuries can use Yunnan Baiyao aerosol to reduce swelling and pain. If the pain is severe, oral non-steroidal anti-inflammatory drugs such as ibuprofen extended-release tablets can be used to relieve pain. 3. Surgery: If the activity is limited and the pain worsens after the fall, there may be a tendency of fracture, which requires surgical treatment such as resetting and internal fixation. If the symptoms are serious, it is recommended to go to the hospital in time to give targeted treatment or therapy. All of the above medications should be used under medical supervision.