For under-eye hollows , CO2 laser usually is not a true fix because hollows are a volume issue, and lasers mainly improve skin texture and tightening rather than replacing lost volume. When CO2 is used in the under- eye area, it’s often done as a single session for more aggressive fractional treatment, while gentler laser approaches may take 3 to 5 sessions spaced about 4 to 6 weeks apart.

What this means

  • If your main concern is hollowness: fillers, fat transfer, or surgery are usually the treatments that directly address volume loss.
  • If your concern is crepey skin or fine lines under the eyes: CO2 laser can help, either in one stronger session or several lighter sessions depending on the device and plan.
  • If the area is very delicate: many specialists prefer conservative treatment, because the under-eye skin can be prone to irritation and longer recovery.

Practical takeaway

A typical answer is:

  • 1 CO2 session for more intensive fractional resurfacing.
  • 3 to 5 sessions for milder under-eye rejuvenation protocols.
  • Not the best tool for hollows alone , since it does not restore lost volume.

Best next step

A consultation matters here because the right plan depends on whether your “hollows” are from fat loss, pigment, skin laxity, or shadowing ; those look similar but are treated differently.