These will give you the most permanent result. It's important to go to a doctor for a consultation before deciding on a size. The first step is to sterilize the area of your lips with anesthetic. Now, wait for the numbness. Once it takes effect, a surgeon can make an incision in each corner of your mouth and insert the implant and place it under the lip fat and above the lip muscles. Once the implant is in place, the incisions will be closed up with one or two non-absorbable stitches.