In short. CO2 resurfacing results last years rather than forever. What makes them fade, why sun exposure decides, and how to judge whether a repeat treatment is worth it.

Key points

  • Daily protection, shade, hats and avoiding deliberate tanning preserve a resurfaced face better than any follow-up product.
  • If you are not prepared to protect the skin afterwards, the honest calculation changes: you would be paying the week and the risk for a result that fades at the speed the sun decides.

Resurfacing is often described as long-lasting, which is true, and occasionally as permanent, which is not. Understanding what has actually changed and what erodes it makes the maintenance question much easier to answer.

What has actually changed

The treatment removes damaged surface and leaves new skin in its place, with collagen rebuilt underneath. That new skin is genuinely different: smoother, more even in colour and texture. What it is not is immune to what damaged it the first time. Skin continues to age, and it continues to be exposed to the sun unless something about that changes.

How long the improvement holds

In most people the improvement is visible for years rather than months, and it fades gradually rather than stopping suddenly. The changes that fade first are the ones the sun can reach: pigmentation and surface quality. The deeper collagen change is more durable. Nothing about this is a guarantee, and no honest clinic can say how long it will last in your skin.

Sun exposure is the variable you control

Daily protection, shade, hats and avoiding deliberate tanning preserve a resurfaced face better than any follow-up product. If you are not prepared to protect the skin afterwards, the honest calculation changes: you would be paying the week and the risk for a result that fades at the speed the sun decides.

What else affects how it settles

Smoking, poorly controlled health conditions and repeated unprotected sun exposure all work against the result, and so does further aggressive treatment too soon afterwards. The daily routine that protects the result is the same one that protects the skin you already have. Some of what people read as the result fading is the face ageing around it, which is why photographs taken before treatment matter far more than memory.

Whether to treat again

A second treatment years later can be reasonable, and it is not automatically the right answer. Treated skin has been through the process before, and a repeat carries the same pigment and healing risks as the first, sometimes more. Where the change is mostly a return of surface pigment, a lighter treatment may be the better tool than a second full resurfacing. The right interval is decided from how your skin looks and behaves, not from a package schedule.

Do not buy a repeat treatment when

  • The first result is still visible and what has changed is your face rather than your skin.
  • You cannot commit to protecting the skin from the sun between now and the next treatment.
  • The previous treatment produced pigment problems and nothing has addressed why.

Resurfacing buys years of better skin, not a new skin. Judged that way it is a reasonable treatment; judged as a permanent fix it disappoints, and the disappointment gets blamed on the treatment rather than on the expectation.

Related reading

Frequently asked questions

How many years does a CO2 resurfacing result last?

For most people the improvement is visible for years rather than months, and it fades gradually instead of switching off. No honest answer in exact years exists, because it depends on your skin, your healing and above all on how much sun the skin sees afterwards. Anyone quoting a fixed number of years is guessing.

What makes the result fade faster?

Sun exposure is the main one, and it is also the one you control. Smoking, poorly controlled health conditions and repeated unprotected sun all work against the result, as does further aggressive treatment too soon afterwards. The changes that fade first are those the sun can reach: pigment and surface quality.

Can I have resurfacing again later?

Sometimes, and it is not automatically the right answer. Treated skin has been through the process once, and a repeat carries the same pigment and healing risks, occasionally more. Where what has returned is surface pigment, a lighter treatment is often the better tool than a second full resurfacing.

Risks & Limitations

  • The treated surface is usually open for five to seven days, weeping and crusting, with redness that persists for weeks afterwards.
  • Post-inflammatory hyperpigmentation is the commonest unwanted effect; it is more frequent and more stubborn in darker skin and can take months to settle.
  • Pigment loss (hypopigmentation) is uncommon but can be permanent, and there is no reliable way to restore pigment that has been lost.
  • Infection of open skin, which is why antiviral cover is ordinarily prescribed; increasing pain after the third day, spreading redness or fever needs same-day review.
  • Scarring, uncommon but real, and more likely after infection, after treatment that was too deep for the skin, on the neck, and in people with a keloid tendency.
  • The improvement is long-lasting but not permanent, and sun exposure after treatment fades it faster than anything else.

When to Seek Care

  • Increasing pain after the third day, or one area much hotter and more swollen than the rest of the treated skin.
  • Fever, spreading redness, or discharge from the treated area.
  • Blistering, dusky or grey patches, or a sore that is not crusting like the rest of the face.
  • A cold sore erupting across healing skin, which should be reported the same day.
  • Swelling that makes it difficult to see, or any new change in vision, which needs urgent review.

References & Further Reading

  • American Society for Laser Medicine and Surgery (ASLMS) — patient information on laser and energy-based treatment
  • American Academy of Dermatology (AAD) — guidance on laser resurfacing and post-inflammatory hyperpigmentation
  • National Institute for Health and Care Excellence (NICE, UK) — relevant guidance on skin treatments
  • Cochrane Library — systematic reviews in skin resurfacing and scar management

Medically reviewed by Ke He, MD (何锞), Deputy Director & Head of Skin & Laser Aesthetics. Last reviewed: 19 September 2026.

This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.