Overall, fractional CO2 laser treatment is very safe. Some temporary redness in the treated area is commonly seen. This may persist for some weeks after the treatment, and in the very occasional case can persist for months.
As with all laser and IPL treatments, the other risks involved include pigment changes (both increased and decreased pigment), as well as risks of infections in the immediately treated areas, and scarring. In addition, some persons do not respond to the treatment. In many cases, more than one treatment may be required.
Find out more about the potential Risks and Effects of C02 Laser Treatment.