Evaluating safety in hyaluronic acid lip injections.

Given the paucity of prospective, randomized clinical trials on the subject and in light of complication underreporting, the authors believe that efficacy and safety literature on the subject is lacking. Injectors must rely on the one strength which exists in the lip literature to date, that is anatomy. The basis of all successful injections is a mandatory understanding of normal as well as variations of vital structures in an area, combined with meticulous injection techniques, deposition of small aliquots of product and the ability to recognize unwanted adverse events early enough to act on them.