When the needle tips make contact with the skin, the needles create tiny punctures in the skin, causing micro-trauma, this induces a healing response, promoting the creation of collagen. The punctures also act as micro-channels that carry topical nutrients used during the treatment deep into the skin for enhanced healing. Because the needles oscillate so quickly, the tip of the pen easily *glides* across the skin, without catching or causing any dermal tearing.