Fractional vs Full-Field Laser Resurfacing

Full-field resurfacing treats the entire surface of an area evenly, while fractional resurfacing treats a grid of tiny columns and leaves small bridges of untouched skin in between. Full-field treatment can produce more change per session but involves longer healing. Fractional treatment heals faster because the untreated skin speeds recovery, though it often needs a series of sessions to reach a similar result.

Picturing the difference

Imagine resurfacing as working on a lawn. Full-field is like lifting the whole top layer of sod at once: the entire surface regrows together. Fractional is like aerating the lawn with thousands of tiny holes: only a fraction of the surface is treated, and the healthy grass around each hole fills it in quickly.

In skin terms, those untreated areas contain living cells that migrate into the treated columns. That is why fractional treatments typically heal in days rather than a week or more.

Depth: two separate choices

It helps to know that "fractional or full-field" and "how deep" are two separate decisions.

• Full-field treatments can range from a very light skim of the surface, sometimes called a laser peel, to deeper resurfacing that reaches into the dermis.
• Fractional treatments can be shallow or can reach deeper than full-field treatments usually do, because only narrow columns are affected and the surrounding skin supports healing.

Both can be ablative (removing tissue) or, with some lasers, non-ablative (heating without removing). With Er:YAG, the wavelength used for resurfacing on a Fotona device, the clinician can adjust depth, coverage and heat for each area. For an overview of how resurfacing works, see laser skin resurfacing: what it is and who it helps.

Downtime compared

Recovery depends on depth, settings and your own skin, so these are only general patterns:

• Light full-field (laser peel): redness and fine flaking for a few days. Many people return to normal activities quickly.
• Fractional: redness, swelling and a sandpaper-like texture with small dots that flake over several days. Pinkness can linger a little longer.
• Deeper full-field: the skin is raw and weepy at first, then crusts and peels. Expect a week or more before you feel comfortable in public, and pinkness that can last for several weeks.

Deeper treatments need more intensive wound care and closer follow-up. Planning around work, family and outdoor plans is important.

With fractional treatment, the total recovery time across a whole series may add up to a similar number of days as one deeper full-field session. The difference is that it is broken into shorter, more manageable stretches. Some people prefer that; others would rather take one longer break and be done. Neither is wrong, and the choice often comes down to lifestyle.

Results compared

Full-field resurfacing treats every part of the surface, so it can create a more uniform change in texture, fine lines and sun damage in a single session. Deeper full-field treatment may produce the most noticeable improvement in surface concerns, along with the longest recovery and highest risk.

Fractional resurfacing works gradually. Each session improves a portion of the skin, so a series spaced several weeks apart is common. Because fractional columns can reach deeper, it is often used for scars, including some acne scars, and for texture concerns that lie below the surface.

In both cases, collagen changes continue to develop for months after treatment. Results vary from person to person.

Neither method lifts sagging skin in a significant way or replaces lost volume, and neither relaxes the muscle activity behind deep expression lines. If those are your main concerns, other treatments, or a surgical opinion, may be more appropriate. Resurfacing is mainly about the quality of the skin's surface and upper layers.

Risks compared

The risks are similar in type but differ in likelihood. Redness, swelling, flaking, acne flares and small white bumps (milia) are possible with both. Infection and cold sore flares can occur after either, especially deeper treatments.

Pigment changes are an important consideration. Darker patches can develop after either method, especially in medium to dark skin or with sun exposure, and usually fade. Lighter patches, which can be longer-lasting, are more associated with deeper full-field treatments. For people with darker skin, a fractional or very light approach is usually chosen to lower that risk. Scarring is uncommon with either but possible.

Who should not have resurfacing, or should wait

Either method is generally postponed or avoided during pregnancy or breastfeeding, with active acne, infection or cold sores in the area, after recent isotretinoin, with a recent tan, with a history of keloids or poor healing, or after radiation to the area. People with a history of cold sores may be offered antiviral medication around the time of treatment. Any changing or unusual spot should be checked by your family doctor or a dermatologist first. Do not stop a prescribed medicine on your own; discuss it with your prescriber.

Choosing between them

Questions worth discussing with your clinician include:

• What is the main concern: overall texture and tone, fine lines, or scars?
• How much downtime can you realistically take, and when?
• Would you prefer one more intensive treatment or a series of lighter ones?
• What is your skin tone, and how has your skin healed after injuries before?
• How much sun exposure will you have over the next couple of months?

Sometimes the answer is a blend, such as a light full-field pass combined with fractional treatment in specific areas. Sometimes it is neither, and skincare is the more sensible starting point.

Frequently asked questions

Is fractional always safer?

Not always. Shallow full-field treatment can be gentler than deep fractional treatment. Safety depends on depth, settings and your skin, not just the pattern.

How many fractional sessions might I need?

It varies with the concern and settings. A series of a few treatments spaced several weeks apart is common, and your clinician can give an estimate after assessing your skin.

Can I switch from one approach to the other?

Yes. Plans often change based on how your skin responds and how recovery went the first time.

If you are trying to decide between approaches, HealthPark Medical Aesthetics can look at your skin, discuss your schedule and goals, and explain the trade-offs at a consultation without any obligation to proceed.