Thank you for your questions and pictures. The collagen stimulatory effects from subcision and fractional CO2 are synergistic and will work well when done together in a certain time frame. Many doctors do it in the same session actually.
Recently though, a new study suggests that doing your subcision two to three weeks apart from the fractional resurfacing session yields marginally better results.
Beside hyperpigmentation, these are some possible risks of fractional CO2 treatment:
1. Prolonged redness
2. Swelling
3. Infection or acne outbreak
4. Dryness
5. Hypopigmentation
Hope this helps!
