Why does your practitioner do this? It’s called capillary refill check and It’s done to make sure the filler was placed properly and that no pressure has been placed on the blood vessels, which could lead to complications. We gently press on the lips and watch how quickly the blood returns… if it’s fast, everything is in check. If it is delayed, it might be a sign that filler is blocking a vessel (although that’s not always the case). It’s a quick, important test to ensure your filler was placed