Microneedling helps with some acne scars and does very little for others, and the difference is the type of scar you have. Shallow rolling scars and softer boxcar scars respond best, because they are indentations where collagen was lost and microneedling exists to rebuild collagen. Narrow, deep ice-pick scars and tethered scars respond poorly on their own. Flat brown or red marks left after a spot are not scars at all and usually need a different treatment altogether.
That distinction decides everything else: which device, how many sessions, and whether microneedling is worth your money in the first place. This guide sets out what is realistic, based on how Dr Nina Bal assesses acne scarring at Facial Sculpting in South Kensington, London. It is general information rather than personal advice, and your own scar pattern can only be judged in person.
First, which kind of acne scarring do you have?
Acne scarring is several different things wearing the same name. Getting the category right is the whole assessment, because each one behaves differently under treatment.
| What you see | What it is | Response to microneedling |
|---|---|---|
| Soft, shallow depressions with sloping edges | Rolling scars, atrophic, collagen lost in the dermis | The best responder. Genuine softening over a course. |
| Sharper, box-like indentations with defined walls | Boxcar scars, atrophic | Shallow ones improve. Deeper, sharp-walled ones improve less. |
| Narrow, deep pits that taper to a point | Ice-pick scars, atrophic | Poor on its own. Usually needs a combination approach. |
| Flat brown or dark patches where spots healed | Post-inflammatory pigmentation, not a scar | Not the primary tool. Pigment-focused treatment fits better. |
| Flat pink or red marks where spots healed | Post-inflammatory erythema, not a scar | Not the primary tool. Often fades on its own over months. |
| Raised, firm scars sitting above the skin | Hypertrophic or keloid scarring, too much collagen | Assessed individually. A keloid history is a reason for caution. |
Most people have a mixture, which is why a plan usually combines approaches rather than repeating one treatment and hoping. The wider picture, including the options that are not microneedling, is set out on our acne scarring concern page.
How does microneedling improve a scar?
A microneedling device creates thousands of controlled micro-channels in the skin. The skin reads that as damage to repair, and fibroblasts respond by producing new collagen and elastin. In an atrophic scar, where the floor of the indentation sits lower than the skin around it because collagen was destroyed during inflammation, that new collagen gradually lifts and softens the depression.
Two things follow from that mechanism, and both are worth understanding before you book.
- It remodels, it does not erase. The goal is a scar that is shallower and less obvious under raking light, not a scar that has gone. Established textured scarring cannot simply be removed.
- It is slow, because collagen is slow. Nothing meaningful shows in the first fortnight. The fuller effect of one session develops over about four weeks, and results accumulate across a course.
The question is never whether microneedling does something. It is whether what it does matches the scar in front of you, and whether you are prepared to give it the course it needs.
SkinPen or radiofrequency microneedling, which is right?
Facial Sculpting offers both, and they are not interchangeable. SkinPen is medical microneedling, the first device of its kind to be FDA-cleared, working mechanically at a controlled depth. Radiofrequency microneedling adds controlled RF heat delivered through the needles into the deeper layers, which reaches further and also firms the skin around the scarring.
| SkinPen | Radiofrequency microneedling | |
|---|---|---|
| How it works | Mechanical micro-channels, collagen induction | Micro-channels plus RF heat into the deeper layers |
| Best suited to | Rough texture, softer and fresher scarring, pores, neck lines | Deeper or older textured scarring, hypertrophic scarring, laxity alongside scars |
| Sessions | Often a course of 3 to 6, 4 to 6 weeks apart | A course of at least three, spaced a few weeks apart |
| Downtime | Mild redness for about 1 to 3 days | Redness and warmth for about 24 to 48 hours |
| Comfort | Topical numbing cream | Topical numbing cream |
| From | £350 per session | £600 full face, £800 full face and neck |
As a rule of thumb: newer, shallower, texture-led scarring tends to start with SkinPen, and older, deeper scarring with any loss of firmness around it tends to start with radiofrequency microneedling. Which one your skin needs is confirmed at assessment, not from a photograph.
How many sessions will it take?
Plan for a course, not a session. SkinPen is usually planned as three to six sessions four to six weeks apart; radiofrequency microneedling as at least three, spaced a few weeks apart. The interval is not padding, it is the time your skin needs to build and organise collagen before the next stimulus.
| Stage | What is happening |
|---|---|
| First 24 to 48 hours | Redness and a warm, tight feeling like light sunburn. With SkinPen, no make-up and no SPF while the micro-channels close. |
| Days 3 to 7 | Redness fades. The skin may feel dry or flake lightly as it renews. |
| Around 4 weeks | New collagen brings visibly smoother texture. This is the point at which one session can be fairly judged. |
| Across the course | Scarring softens session by session. The final result develops over the weeks after the last session. |
Results are not permanent. Collagen turns over, so maintenance and consistent home care matter, and outcomes vary with skin type, age, the concern being treated and aftercare.
When microneedling is not the answer
Saying no is part of the assessment. Microneedling for acne scarring is not appropriate, or not the first step, in several situations.
- Your acne is still active. Treating scarring while inflammation continues both risks the skin and wastes the course, because new scars form as fast as old ones soften. Bringing breakouts under control comes first, with your GP or a dermatologist where needed.
- Your concern is pigment or redness, not texture. Flat brown or pink marks are discolouration left behind by healing, not scars. They respond better to pigment-focused and light-based approaches, covered under pigmentation and sun damage.
- You have a history of keloid scarring. This is a reason for caution and individual assessment rather than a routine course.
- You have recently taken oral isotretinoin. Recent use, along with certain other medications and medical conditions, affects timing and suitability.
- There is an active infection, a cold sore, or an eczema or rosacea flare in the area. Treatment waits until the skin has settled.
- You are expecting a lift. Microneedling refines texture. It does not lift sagging skin or remove deep static wrinkles. That is a different conversation, and often a different treatment.
Radiofrequency microneedling has its own additional considerations, including certain implanted electronic devices such as a pacemaker. Everything here is reviewed properly at consultation before anything is booked.
What are the risks and side effects?
Both treatments are minimally invasive medical procedures and are generally well tolerated. The common, temporary effects are redness, warmth, mild swelling, pinpoint marks, tightness and light flaking, settling within a few days. Less common effects include bruising, prolonged redness, temporary changes in pigmentation and, rarely, infection if aftercare is not followed.
Two things reduce avoidable risk more than anything else: correct needling depth for your skin, and an experienced practitioner who has assessed you first. Pigmentation must be managed particularly carefully in deeper skin tones, where settings matter. If anything is unexpected after treatment, contact the clinic rather than waiting.
What else is used for acne scarring?
Microneedling is one route among several, and a good plan often sequences two or three. Depending on what your assessment finds, the options at Facial Sculpting may include medical peels such as AlumierMD peels for marks and tone, resurfacing with the LaseMD Ultra thulium laser, light-based treatment with BBL HEROic where redness and pigment are part of the picture, and Dermalux LED to support the skin between sessions.
The order matters as much as the choice. Active acne is controlled first, then texture, then whatever pigment or redness remains once the skin has calmed.
Common questions about microneedling for acne scars
Does microneedling get rid of acne scars completely?
No. It softens and shallows textured scarring by rebuilding collagen, which for the right scar type is a substantial visible improvement. Complete removal is not a realistic outcome, and any clinic promising it is overselling.
How long before I see a difference?
Around four weeks after a session for the first fair look, with improvement continuing across the course and for some weeks after the final session. Judging the result at two weeks will only mislead you.
Is microneedling safe for darker skin tones?
SkinPen is suitable for all skin types, including darker skin tones, with a low risk of pigmentation change when performed correctly. Correct settings and an experienced practitioner matter more here than anywhere, which is why assessment comes first.
Does it hurt?
Topical numbing cream is applied before both treatments. Most people describe pressure, vibration and warmth rather than pain. Afterwards the skin feels like light sunburn for a day or two.
Can I wear make-up afterwards?
Not straight away with SkinPen. Avoid make-up, and even SPF, for the first 48 hours while the micro-channels close, then reintroduce gentle skincare and daily sun protection as advised. After radiofrequency microneedling, mineral make-up can usually be worn once the skin has calmed.
Should I treat my acne first?
Yes. Scar treatment while acne is still active is treating a moving target. Get the breakouts controlled, then assess what scarring has actually been left behind.
Reading on
- Acne scarring, the full concern hub with every treatment route matched to scar type.
- SkinPen microneedling and radiofrequency microneedling, the two treatment pages with pricing and clinical detail.
- Which face peel is best for you, if marks and tone are more of your concern than texture.
- Full price list.
If you are not sure which kind of scarring you have, that is exactly what the first appointment is for, and it is the only way to know whether a course of microneedling is worth committing to. Book a consultation at our South Kensington clinic, or message us on WhatsApp.
