How does the fractional CO2 laser work

The fractional CO2 laser takes the CO2 laser beam and fractionates, or pixellates that beam into thousands of tiny little shafts of light. These tiny shafts of light penetrate into the deeper layers of the skin. The skin then repairs those tiny shafts by pushing out the old sun damaged skin and replacing it with new skin. The “collateral” heat damage also helps to shrink existing collagen.Can I do the fractional CO2 laser with other cosmetic treatments?

How long do the effects of a fractional CO2 resurfacing laser treatment last?

That depends on how well you protect your skin from the sun and other factors that cause aging like your general health, smoking, changes in weight, etc.  If you apply sunscreen and wear brimmed hats, you can maintain the good effects of your CO2 laser treatment for several years.

Not the same day generally. The CO2 laser is compatible long term with Botox, Juvederm, Restylane, Sculptra and other laser based technologies like hair removal, Fraxel Restore, IPL, pulsed dye, etc.