Acne clears up, but the marks it leaves behind often do not. Many adults spend years on serums, peels and facials, only to find that the dents and uneven texture look exactly the same in daylight. The reason is usually depth: most acne scars sit in the dermis, below the reach of anything applied to the surface. At Kliniken, the Harrogate day surgery centre, consultants approach acne scarring treatment by first identifying which type of scar a patient actually has, because the right option depends far more on scar shape and depth than on which treatment happens to be popular.
This guide walks through the main scar types, the options that suit each one, and what to ask before you book anything.
Why acne scars do not fade on their own
A scar forms when an inflamed spot damages the collagen network that supports the skin. When the body repairs that damage, it rarely rebuilds the network perfectly. In some places too little collagen is laid down, leaving a depression. In others, the healing tissue tethers the surface to deeper layers and pulls it downward.
Topical products, including retinoids and acids, work mainly on the outer layer. They can improve dullness, mild roughness and red or brown marks left after a breakout (which are pigment changes rather than true scars). They cannot rebuild collagen that has gone missing a millimetre or two below the surface. That is why many people see an early improvement from a new routine, followed by a plateau that no amount of extra product changes.
Age adds to the problem. Collagen production slows from the late twenties onwards, so scars that looked mild at 22 can look more pronounced at 40 even though the scars themselves have not changed.
The three main types of acne scar
Before any treatment plan, a good clinician will classify the scars. Most people have a mix, but one type usually dominates.
Rolling scars are broad, shallow depressions with soft, sloping edges. They give the skin an undulating look and are most visible under overhead or side lighting. They are often caused by fibrous bands tethering the skin to deeper tissue.
Boxcar scars are wider depressions with sharper, more vertical edges, a little like a chickenpox mark. They can be shallow or deep, and shallow boxcar scars tend to respond best to resurfacing.
Ice-pick scars are narrow and deep, often less than 2 mm across at the surface but extending well into the dermis. Because they are so deep relative to their width, surface treatments rarely touch them on their own.
There are also raised (hypertrophic and keloid) scars, which are more common on the chest, back and jawline. These need a different approach altogether, such as steroid injections or specialist scar management, and should be assessed separately.
Matching the treatment to the scar
No single treatment suits every scar type, which is why combination plans are common.
For shallow boxcar and mild rolling scars, resurfacing is usually the backbone of treatment. Resurfacing removes or heats controlled layers of skin so that the body produces new collagen as it heals. Kliniken offers laser skin resurfacing in Harrogate using a CO2 laser, which is one of the more effective energy-based options for textural scarring.
For tethered rolling scars, a technique called subcision can help. A fine needle is passed under the scar to release the fibrous bands pulling it down, which lets the surface lift. It is often paired with resurfacing a few weeks later.
For ice-pick scars, a targeted method such as a punch excision or a focal chemical treatment may be needed first, because the scar is too deep and narrow for resurfacing alone. Once the deepest marks are dealt with, the surrounding texture can then be smoothed.
For mixed scarring, which is what most adults have, a staged plan works best: release tethered scars, treat deep narrow ones, then resurface the whole area to even out texture.
Fractional or fully ablative resurfacing?
Within CO2 resurfacing there are two broad approaches, and the choice affects results, downtime and risk.
A fractional laser treats the skin in a grid of tiny columns, leaving untreated skin in between. The untreated areas speed up healing, so downtime is shorter, typically around a week of redness and flaking. Several sessions are usually needed for meaningful scar improvement.
A fully ablative CO2 laser removes the entire outer layer across the treatment area. It can produce a more dramatic improvement in a single session, but recovery is longer and the aftercare is more demanding. It is generally reserved for more significant scarring, or for patients who prefer one intensive treatment over a series. Kliniken has a clear comparison of fractional versus fully ablative CO2 laser treatment that sets out who each option tends to suit.
Skin type matters too. Darker skin tones carry a higher risk of post-inflammatory pigmentation after aggressive resurfacing, so settings, preparation and sometimes the choice of treatment need to be adjusted. This is one of the main reasons a face-to-face assessment matters more than any online quiz. There is a longer discussion of the trade-offs in choosing between fractional and fully ablative resurfacing.
Recovery and realistic expectations
Scar treatment improves scars; it does not erase them. A realistic goal for moderate acne scarring is a visible softening of depth and texture, with the skin looking smoother in daylight and makeup sitting more evenly. Many patients describe a 50 to 70 percent improvement after a full course, though results vary with scar type, skin type and how well aftercare is followed.
Collagen remodelling continues for months after treatment, so the final result is usually judged at around three to six months rather than in the first few weeks. Sun protection during this period is essential, because newly treated skin pigments easily. For a step-by-step account of the healing days, see this guide to what to expect before, during and after CO2 laser resurfacing.
Cost depends on the number of areas, the type of laser and how many sessions are required. If budget is part of your decision, this overview of what affects the cost of CO2 laser skin resurfacing in the UK explains the main factors and why quotes can vary so widely between clinics.
Questions to ask at your consultation
- Which types of scar do I have, and which is the main concern?
- Will resurfacing alone help, or do I need subcision or a targeted treatment first?
- Fractional or fully ablative, and why for my skin?
- How many sessions should I expect, and how long is the downtime for each?
- What is the pigmentation risk for my skin type, and how will it be managed?
- Who performs the treatment, and what aftercare support is included?
A clinic that answers these clearly, examines your skin in person and is willing to say when a treatment is not right for you is usually a good sign.
Next steps
Acne scars are frustrating precisely because so much effort can go into them with so little change. The turning point for most people is understanding that the problem sits below the surface and choosing a treatment that reaches that depth. If you are in North Yorkshire and would like your scars assessed by a consultant, you can contact the Kliniken team to arrange a consultation in Harrogate.