How long would it take for swelling to go completely down after chin reduction surgery? (Photos)

Most of the swelling comes on fast (peaks at day 3) and then reduces to 80% by 2 weeks, another 10% in another 2 weeks (90% at week 4), and the last 10% over a couple of months. Most people don't notice that last 10%, so you would notice most of your outcome within a month. I would also recommend doing a reduction genioplasty, not just contouring of the chin...the soft tissue adapts better and minimizes the amount of soft tissue you need to remove under the chin.