Pain relief from Rejuran Healer treatment for severe internal dryness and skin barrier strengthening

My skin feels so tight deep down year-round that washing it causes excruciating pain, as if it's tearing apart, and white flakes of dead skin appear. It feels like my oil-water balance is completely off; my skin is shiny on the surface but feels parched underneath. Perhaps because my skin barrier has compromised, it becomes sensitive to even the slightest irritation. I heard that Rejuran Healer, which regenerates skin cells, is the best treatment for internal dryness, so I decided to get the procedure at Maypure. However, I am very worried because I have heard that the pain is immense since the procedure involves injecting the entire face densely with a hand needle. I am wondering if Maypure provides any special care other than anesthetic cream to reduce pain. Please also let me know how many days it usually takes for the raised, embossed marks on the face to completely disappear after the procedure.