The GentleLASE Laser produces an intense but gentle burst of light that selectively cuts off the blood supply of the blood vessels of your spider veins, without damaging the surrounding tissue. After laser treatment the surrounding tissue is left intact. The DCD (Dynamic Cooling Device) which is built into the laser system, delivers a short burst or spray of cryogen just prior to the laser pulse being delivered. The DCD has been instrumental in reducing pain associated with treatment, as well as reducing the possibility of blister/scab formation. The feeling of a laser pulse has been described as being snapped by a rubber band or a slight stinging sensation. Following laser treatment, the area may continue to sting slightly or feel warm like a sunburn.