During treatment apply serum (if desired), but not necessary. We recommend a pure Hyaluronic Serum to enhance results greatly. Roll the Dermaroller gently over the skin whilst applying little pressure to allow the needles to penetrate your skin. Roll over each area 8-10 times in each direction: vertically, horizontally & diagonally (forwards and back equals two rolls). From every stroke lift the roller off your skin, do not drag it across your skin. If you feel that your skin is becoming sore or irritated, you may be applying too much pressure. Frequency of rolling depends on your age, skin concern & desired result. Follow pre & post guidelines below.