After lip filler injections, the formation of small, firm lumps, sometimes due to the filler being placed superficially, may occasionally be observed. These usually resolve spontaneously or with gentle massage. Should any lumps persist beyond two weeks following a hyaluronic acid injection, they can be safely and effectively treated with hyaluronidase enzyme injections. Hyaluronic acid fillers are designed for high biocompatibility and integrate seamlessly with the body's natural tissues, which means issues like sliding or displacement are exceedingly uncommon.