Modern Plastic Surgery can alleviate the problem of small lips, whether it's due to anatomical reasons or simply due to the passing of time. Full lips have always been important for a good looking image.
Usual methods used to correct the problem include Hyaluronic Acid injections, which last for quite a while. Modern materials are tested and safe. HA injections are performed repeatedly so we can gradually achieve the desired look. The result usually lasts for a year and can be repeated. This can also work in our favor because if the results are not what we were trying to achieve they can be fixed. Modern injectable materials have almost done away with older procedures which involved prosthetics.