I have milia after CO2 laser, what do I do? I am 70 years old.

I suggest following up with your doctor or a cosmetic dermatologist for a formal evaluation and after care recommendations. I recommend skin care with vitamin c, b5 hydrator, silicone-based scar gels with growth factors, and enzymatic washes with papaya enzyme to give improvement. Sun protection is essential.
Lasers like CO2 work best in combination with other treatments in order to improve the skin's texture and collagen. After CO2, I recommend adding Fraxel lasers, microneedling/PRP, and radiofrequency treatments. Best, Dr. Emer