Hyalase is a substance used to correct and reverse fillers that have produced undesirable results or have been administered incorrectly. Incorrectly placed fillers can create asymmetry or lumpy areas in the treated area. In such cases, Hyalase injections are used to dissolve the filler material, reversing the effects and allowing for corrections to be made. This is particularly useful when performed by inexperienced doctors or when the procedure was not done correctly.