The biggest cause for early asymmetries after filler injection into the lips is swelling or slight bleeding into the tissues. Often by 1 week post injection, this swelling has "ironed itself out". At that time, additional injections may be considered. Restylane tends to clump a bit, so massaging the areas can smooth out the lumps immediately after injection. Fillers do not even out asymmetries in the cupid's bow. Placing more and more filler on the low side will only result in a very plump, and lower, lip on one side. So it is nice to note any asymmetries before injection and point out to the patient that not all asymmetries will be fixed by injections.