2. Keep it level: the needle roller should be kept level when using, about 15 degree angle, to avoid excessive pressure on the skin and cause scratches.
3. Pay attention to the strength: you can roll in an upward direction to help lift the skin and reduce sagging.
4. Cooling: Roller needles can be chilled in the refrigerator. Cooled rollers help to reduce swelling and fatigue of the skin and increase the stimulating effect on the skin.
It is recommended to check the product instructions for specific information.