Key takeaways
- Colour left by acne may be brown, grey, red or violet and may change as inflammation settles. A depression or raised area also changes the skin structure; it can remain after colour fades. AAD
- The AAD usually starts with controlling active acne before scar procedures, to reduce inflammation and prevent further marks and scars. AAD
- Retinoids or azelaic acid may help acne and some colour changes. They do not recreate lost tissue or flatten every raised scar; depressed and raised scars need their own assessment. AAD
Acne marks versus acne scars: why the treatment options differ
A flat patch of colour left after acne is not the same structural change as an indented or raised scar. Post-inflammatory hyperpigmentation, post-inflammatory redness and true scars can occur together, but they do not have one interchangeable treatment. The useful first question is whether the concern is mainly colour, texture, active acne, or a mixture.
Is a flat acne mark a scar?
A flat colour change usually differs from a scar that changes the skin surface. The American Academy of Dermatology (AAD) explains that a flat spot of colour after acne is usually post-inflammatory change rather than an acne scar. In lighter skin this may look pink or red; in darker skin it may appear brown, grey or violet. The surface remains flat even though the colour is different.
True acne scars change the contour or thickness of the skin. Atrophic scars sit below the surface and may be described as ice-pick, rolling or boxcar scars. Hypertrophic scars and keloids are raised because extra scar tissue has formed. One person can have several patterns, so a generic “scar fading” product cannot answer every part of the problem.
| What is visible? | Main change | Why the distinction matters |
|---|---|---|
| Flat brown, grey or darker patch | Post-inflammatory hyperpigmentation | Treatment focuses on ongoing acne, irritation control, sun protection and selected pigment-directed options |
| Flat pink, red or violet patch | Post-inflammatory vascular or colour change | It may settle differently from excess pigment and needs assessment if persistent or uncertain |
| Depression or uneven contour | Atrophic scar | Creams cannot replace all lost volume; scar-specific procedures may be discussed |
| Firm raised area | Hypertrophic scar or keloid | Requires a different assessment from an indented scar and may recur after treatment |
Why is controlling active acne part of scar care?
Treat the breakouts that could leave the next scar. In the AAD’s account of a scar consultation, acne treatment often comes first. Scar treatment usually starts once breakouts are controlled and the person is using medicine to prevent new ones. Someone whose parent or sibling has acne scars has a further reason to seek early acne treatment.
NICE’s acne guideline, updated in April 2026, covers scarring prevention and management. It recommends referral when acne is causing scarring or persistent pigmentary changes, and notes that scarring risk increases with acne severity and duration.
Do not squeeze, scratch or repeatedly pick lesions. Manipulation increases inflammation and can increase the chance of colour change or scarring. Deep, painful acne, rapidly worsening acne or early scarring warrants a treatment review rather than a sequence of increasingly harsh home products.
The isotretinoin comparison guide explains why oral isotretinoin is not simply “stronger cream” and why its monitoring and pregnancy-prevention requirements are separate from topical care.
What can topical medicines realistically address?
Topical treatment can help acne, colour changes and some mild scarring. Topical retinoids such as tretinoin or adapalene can be used in acne plans and may improve some surface irregularity or post-acne colour over time. Azelaic acid can address acne inflammation and post-inflammatory hyperpigmentation in suitable users; the AAD includes it among options that can treat acne and the dark marks left after spots clear.
The AAD makes a narrower claim for home treatment: a retinoid or salicylic acid may make mild scarring less noticeable. Its options for a sunken scar include surgery to free skin from the tissue beneath it, followed in some cases by filler. Neither step is the job of a pigment cream.
Layering active products can irritate the skin and worsen visible inflammation or pigment change. Agree the product, formulation and frequency, with moisturiser and sunscreen, rather than copying a “strongest routine”. The AAD adult-acne guide advises trying one suitable product as directed for 6 to 8 weeks before adding another. That is time to judge the acne treatment, not a deadline for a scar to flatten.
Pregnancy changes these choices. Dermatologist Ramone Williams, in the AAD adult-acne article, advises a consultation before self-treatment when pregnant or trying to conceive. Check the exact retinoid with the clinician before starting, continuing or exchanging it. A household member’s medicine should not be shared. Large painful pimples deep in the skin, or acne leaving scars, also need professional treatment; the article says products bought online or in shops are unlikely to treat these effectively.
Why do indented and raised scars need different procedures?
Depressed scars need a different approach from excess raised scar tissue. The AAD’s scar-treatment overview describes why scar type guides the choice between procedures such as needling, subcision or scar surgery, resurfacing, fillers, injections and selected laser or light treatments. An ice-pick scar and a rolling scar do not respond identically. The guide describes surgery to lift a sunken scar, sometimes followed by filler for volume. Most fillers give temporary results, ranging from 3 months to 2 years; some are permanent, although even these may need later touch-ups as skin ages.
The AAD puts raised scars in another treatment group: they form when the skin makes too much collagen. For a hypertrophic scar, its options include a laser, an injection into the scar or a prescription medicine applied to it. A keloid can be harder to remove and may return. The AAD therefore describes using two or more approaches, potentially an injection, laser, surgery or freezing. The choice depends on which raised scar the dermatologist finds.
Skin tone, tendency to form keloids, active inflammation and prior treatment affect the risk of burns, infection, prolonged redness or new pigment change. This is why copying a device setting, peel strength or needling depth from social media is unsafe. A procedure marketed under one name can also vary substantially by operator and device.
Discuss downtime, cost and the amount of improvement you would value. Treatment can make scars less noticeable, but no procedure guarantees complete removal. The AAD gives mild peels as an example where 3 to 5 sessions may be needed, spaced 2 to 4 weeks apart. It also describes pre-peel preparation and sun protection to reduce unwanted colour changes. A plan may combine approaches and several visits.
What changes the answer?
Active acne, scar pattern, skin tone and treatment history guide the plan. The AAD asks for all acne treatments used now or within the past two years, because some procedures can cause unwanted effects during or soon after certain acne medicines.
- Active acne. New inflammatory lesions usually need control alongside or before scar-directed work.
- Scar pattern. Flat colour, depressions and raised scars require different plans.
- Skin tone and pigment response. Irritation and procedures can produce new light or dark changes.
- Pregnancy or pregnancy planning. This changes the suitability of retinoids and some procedures.
- Recent or current medicines. Tell the clinician about isotretinoin, retinoids, anticoagulants and products that irritate or thin the skin.
- Keloid history. A personal or family tendency toward raised scars changes procedural risk.
When should the diagnosis be checked?
Have deep acne, rapid scarring or an uncertain mark assessed. Arrange assessment for deep or painful acne, rapid scarring, a growing raised scar, persistent colour or texture change that is difficult to classify, or a mark that bleeds, ulcerates or changes unexpectedly. Acne-like eruptions can also be rosacea, folliculitis or another condition that needs a different plan.
Bring the current skincare and medicine list, including non-prescription acids, retinoids and devices. The AAD adult-acne guide describes fewer breakouts after 4 to 8 weeks and clearing at around 16 weeks when a medicine works for the individual; it advises review when the expected result is not emerging. That is an acne-treatment timeline, not a promise that scars will disappear in the same period. The acne condition page and hyperpigmentation condition page can organise the terminology, but a clinician needs to see the surface and scar pattern before recommending a procedure.
Sources
- NICE: Acne vulgaris: management.
- American Academy of Dermatology: Acne scars: overview.
- American Academy of Dermatology: Acne scars: consultation and treatment.
- American Academy of Dermatology: Acne: diagnosis and treatment.
- American Academy of Dermatology: Adult acne treatment dermatologists recommend.
