Why is CO2 fractional laser a good treatment for acne pits?

This is a self-report of a Chinese patient about fractional laser, recording his own story of fighting against acne scars to do fractional laser treatment.

🌞The first day after doing the CO2 fractional laser treatment.
🌚The doctor applied anesthesia on my face first for about 15 to 20 mins.
💉Then start treatment, shooting in my face.
❄After treatment, the nurse spray growth factors, apply medical beauty mask and ice pack on my face
🧐Looking forward to the changes next days.
📻The machine doctor used is fotona 4d 👇https://nianshengfactory.com/products/x1

🔧Repair after treatment： Do not wash your face within 7 days, spray growth factors in the morning for 2-6 days, and apply growth factor gel at night