In the post-procedural period, careful consideration should be given to the use of certain topical products. In particular, some active ingredients commonly found in skincare formulations may influence the persistence of hyaluronic acid within the tissue. Based on my clinical observations, the most clearly implicated agent negatively affecting the longevity of scar filler outcomes is retinoic acid. Topical preparations containing retinoic acid have been observed to induce early degradation of the filler, even with short-term use.

Furthermore, following the use of certain products containing alpha hydroxy acids (AHAs) and beta hydroxy acids (BHAs), clinical observations in some patients have raised suspicion of a potential reduction in the effectiveness of scar filler treatment. However, this effect cannot be generalized to all AHA/BHA-containing products and is likely related to specific active components within these formulations. Moreover, it is not always possible to definitively identify which particular component is responsible for this effect in a clinical setting.

Therefore, based on current clinical experience, the use of topical preparations containing retinoic acid should be strictly avoided in the post-procedural period following scar filler treatment.