There are a variety of treatment options for lip augmentation. The quickest way is with filler injection. Prevelle is quite soft and less bumpy but short duration. Typically about 2 months. Restyland and Juvederm have all been used on the lips as well. They are typically slightly longer lasting (about 2 to 3 months) but tend to have more lumpiness post injection. It's easily managed with massage and typically will go away after few days. Fat may have the longest longevity however the result can change with your weight change and you may also encounter fat necrosis. Finally, there is surgilip and soft silicone permanent implant for permanent enhancement. The implantation is more involved and possible complications exist. With all these options available, make sure you talk to a well qualified plastic surgeon who's experienced with all of the above treatment modalities to give you the most appropriate guidance.
Stewart Wang, MD FACS