You've finally got the breakout under control, the scratch has healed, or the treatment bump has settled. Then the mark stays behind. It isn't raised, it isn't sore, but it's still there every time you look in the mirror.
That lingering dark patch is often post inflammatory hyperpigmentation, or PIH. We see it regularly in clinic after acne, eczema, picking, friction, cosmetic procedures and any episode that leaves the skin inflamed. The frustrating part is that the original issue can be gone while the pigment remains.
How to treat post inflammatory hyperpigmentation properly depends on two things. First, we need to identify whether it really is PIH and not another pigment condition. Second, we need to choose a sequence that calms inflammation, protects the skin and fades pigment without creating more of it.
Understanding Those Lingering Dark Marks
PIH is the skin's pigment response to injury or inflammation. When the skin is irritated, it can produce excess melanin, which leaves a brown, grey or deeper discolouration after the original spot or injury has healed.
PIH isn't the same as melasma or sun spots. Melasma is usually more symmetrical and hormonally influenced. Solar lentigines are linked more directly to cumulative sun exposure. PIH follows inflammation. That difference changes the treatment plan.
Where the pigment sits changes the outcome
One of the biggest practical points in clinic is depth. Epidermal PIH sits closer to the surface and usually responds more predictably to skincare and controlled professional treatment. Dermal PIH sits deeper and can be much more stubborn.
Evidence shows that epidermal PIH is the most amenable to topical treatment, while deeper dermal PIH is harder to clear and can persist for months to years if not addressed early with a proper plan, as outlined in this clinical review of PIH in skin of colour.
Consultation reality: when a mark has a grey-brown cast, has been present for a long time or followed repeated trauma, we're often dealing with pigment that won't respond quickly to a random brightening serum.
Why self-diagnosis often goes wrong
Many clients tell us they've been “treating pigmentation” for months before coming in. In reality, they may have been treating the wrong kind. PIH often needs a calmer, more strategic plan than people expect, especially if the trigger is still active.
That's why assessment comes first. We need to know what caused the mark, how long it has been there, whether you're still getting inflammation and how reactive your skin is overall. If you want a fuller breakdown of the differences, our guide to understanding pigmentation types, causes and treatments is a useful starting point.
Your First Response to Skin Inflammation
Most PIH is made worse in the first few days, not the first few months. The earlier we reduce trauma, irritation and UV exposure, the better the mark usually behaves.
The instinct to squeeze, scrub or “dry it out” is often what deepens the problem. That's especially true after acne lesions, ingrown hairs, bites, rashes and overuse of harsh actives. If the skin is inflamed, aggressive treatment doesn't speed healing. It often leaves a darker reminder.
What we want you to do straight away
When skin is actively irritated, simplicity wins.
- Keep hands off the area. Picking, squeezing and scratching prolong inflammation and can push marks deeper.
- Cleanse gently. Use a mild cleanser and lukewarm water. Don't use scrubs, cleansing brushes or rough flannels on compromised skin.
- Support the barrier. A bland moisturiser can help the skin recover without adding unnecessary irritation.
- Pause the urge to over-treat. If the area is sore, broken or reactive, piling on exfoliants usually backfires.
Repeated trauma is one of the most common reasons PIH hangs around. Clients often focus on which product to buy next, but the more important question is whether the skin is still being provoked every day.
Sunscreen is not optional
For any exposed PIH, a daily broad-spectrum SPF 50+ is the technical benchmark. Dermatological guidance is explicit that this is essential to minimise UV-induced darkening, which can erase gains from treatment, as noted in this photoprotection guidance for hyperpigmentation.
In practical terms, this means the mark can darken even when the breakout has healed well. It also means an expensive treatment plan can stall if sun protection is inconsistent. In the UK, people often underestimate exposure because they aren't sunbathing. Walking the dog, driving, sitting by a window and spending time outdoors on bright but cool days all count.
The best early move is often not a stronger pigment product. It's controlling inflammation fast and protecting the area every single day.
The common mistakes that slow progress
We see the same patterns again and again.
| Mistake | What it does |
|---|---|
| Picking blemishes | Creates more inflammation and often darker residual marking |
| Using too many acids at once | Irritates the skin and can prolong pigmentation |
| Skipping sunscreen on cloudy days | Allows UV to keep darkening exposed PIH |
| Chasing quick fixes | Leads to inconsistent use and more barrier disruption |
A simple first-aid mindset
If a spot has just healed, treat the area like skin that needs calm, not punishment. We'd rather see a client use a gentle cleanser, moisturiser and proper SPF than throw five harsh products at a fresh mark.
That doesn't mean doing nothing forever. It means building from a stable base. PIH improves best when the skin is no longer stuck in a cycle of inflammation, friction and accidental sun exposure.
Building Your At-Home Treatment Programme
Once the skin is calm and you're protecting it properly, home care starts to matter much more. We begin to fade existing marks while reducing the chance of fresh ones settling in.
The aim at home isn't to attack pigment from every angle on day one. It's to use the right actives in the right order, at a pace your skin can tolerate. Good PIH routines are usually boring in the best way. Consistent, measured and repeatable.
The ingredients we prioritise most often
A proper at-home programme usually combines pigment control with skin renewal and inflammation management.
Retinoids are one of the most useful categories in PIH. They encourage skin renewal and can help pigmented cells clear more efficiently. They also make sense when acne is part of the picture, because fading marks while reducing breakouts is far more efficient than treating those two issues separately.
Topical retinoids are one of the most frequently reported interventions for PIH in skin of colour, with studies showing partial improvement in up to 85% of participants after 12 weeks of consistent use, according to this systematic review on PIH treatments.
Azelaic acid is another strong option in practice. We use it a lot when clients are acne-prone, reactive or not ready for stronger pigment products. It can fit well into a plan because it supports both clarity and pigment management.
Vitamin C can also be useful, especially in the morning alongside sunscreen. We see it as supportive rather than magical. It works best when the rest of the routine is already sensible.
Hydroquinone, where appropriate and professionally guided, remains a recognised mainstay topical lightening agent in PIH management. It's not where everyone starts, and it isn't a casual over-the-counter fix, but it remains an important part of the wider treatment range.
How to introduce actives without creating new irritation
A lot of PIH routines fail because the products are wrong for the skin's tolerance, not because the ingredients are poor. If a retinoid leaves the skin red, tight and flaky every night, you may end up extending the very inflammation you're trying to reduce.
We usually prefer a staged build.
- Start with the basics first. Cleanser, moisturiser and a reliable SPF 50+ need to be stable.
- Introduce one active at a time. That makes reactions easier to spot and control.
- Use less before using more. Fewer nights per week is often smarter than forcing nightly use too early.
- Watch the skin, not the calendar. Mild adjustment is manageable. Ongoing stinging, peeling or irritation means the routine needs changing.
If your skin is angry, your pigment plan needs simplifying.
A practical routine that makes sense
Morning can stay quite straightforward.
- Cleanse lightly if needed
- Apply an antioxidant or pigment-support serum if suitable
- Moisturise to keep the barrier comfortable
- Finish with broad-spectrum SPF 50+
Evening is where we usually place the stronger corrective work.
- Cleanse properly to remove sunscreen and debris
- Apply your treatment product, such as a retinoid or azelaic acid depending on the plan
- Moisturise to reduce dryness and support tolerance
Not everyone needs every category. Some clients do better with a stripped-back programme. Others are suitable for combination topical plans once the skin has proved it can tolerate more.
Why product choice matters more than product count
We often see routines with six or seven “brightening” products layered together. That usually creates confusion, not better outcomes. The skin doesn't need a crowded shelf. It needs a programme that has a clear job.
That might include professional skincare such as AlumierMD where appropriate, especially when we want better control over formulation and skin tolerance. The key is still the same. Correct diagnosis, calm application and enough time to work.
Here's the trade-off. Stronger isn't always faster. A milder routine used consistently often beats a harsh routine that gets abandoned after two weeks.
When home care has done enough
At-home treatment is often the first proper phase, not the whole story. If the mark is superficial and the trigger is under control, skincare may be enough. If the pigment is older, deeper or tied to repeated breakouts, home care may need support from clinic treatment.
A practical way to think about it is this. Home care creates the conditions for improvement. In-clinic treatment may then help move stubborn pigment further, but only when the skin is ready.
Advanced In-Clinic Treatments for Stubborn PIH
When PIH doesn't shift well enough with home care alone, we start weighing professional options. Treatment choice matters a great deal, because not every procedure that can target pigment is a good choice for every skin tone or every type of PIH.
Our approach is safety-first and inflammation-aware. That means we don't jump to the most aggressive option. We look at what caused the pigment, how stable the skin is now and whether the treatment itself might trigger more marking.
Why we usually stay conservative first
A 2024 review found that for PIH in skin of colour, topical retinoids were the most frequently used treatment at 22% and reported partial improvement in 85% of cases, while laser therapy at 17% showed partial improvement in 66%, supporting a conservative, topicals-first approach according to this 2024 review of PIH interventions.
That mirrors what we see in practice. If the skin is still active, irritated or easily triggered, aggressive treatment can be the wrong move. Procedure-based options may help epidermal PIH in the right candidate, but they can also aggravate pigment if they create too much inflammation.
Chemical peels
Chemical peels can work well for suitable PIH, especially when pigment is more superficial and the skin has been prepared properly. The goal isn't to “burn off” pigment. It's controlled exfoliation and renewal.
We tailor peel choice carefully. Strength, formulation, skin tone, barrier function and the history of PIH all matter. A peel can be helpful, but a peel done too soon, too strongly or on unstable skin can push the skin backwards.
For clients exploring this route, our pages on Chemical Peels and chemical peels for dark skin explain the considerations in more detail.
Microneedling
Microneedling can be useful when PIH sits alongside textural change, post-acne skin changes or dull, uneven recovery. It works differently from a peel. Instead of mainly exfoliating the surface, it creates controlled micro-injury that supports renewal.
The word “injury” is exactly why treatment selection matters. Done properly, microneedling can be a sensible part of a pigmentation plan. Done at the wrong intensity, too frequently or on poorly prepared skin, it can provoke more inflammation than the skin can handle.
That's why we assess carefully before recommending Microneedling. We look at pigment pattern, current acne activity, skin tone, healing behaviour and aftercare reliability.
SQT Bio-Microneedling and supportive treatments
Some clients aren't suitable for the same pathway. That's where alternatives and supportive treatments come in. SQT Bio-Microneedling may be considered where we want a resurfacing-style approach without defaulting to the same standard protocol for everyone.
We may also use supportive treatments such as HydraFacial, LED therapy or selected skin conditioning facials to improve tolerance, hydration and barrier function around the core pigment plan. Supportive treatments don't replace pigment correction, but they can make the skin easier to treat and less likely to flare.
What we don't offer and why
We do not offer laser therapy for PIH at Skin Revision. That choice is deliberate. Lasers have a place in pigment medicine, but they are not risk-free, particularly in clients who pigment easily or have darker skin tones.
The trade-off is straightforward. A device may target pigment, but if it also creates enough epidermal injury to trigger fresh inflammation, the gain can be limited or reversed. We'd rather use methods we can control more gradually when that makes better clinical sense.
The safest treatment is often the one that respects your skin's tendency to pigment, not the one that sounds most high-tech.
How we choose between options
We don't match treatments to trends. We match them to skin behaviour.
| Situation | What we're usually thinking |
|---|---|
| Fresh marks with ongoing acne or irritation | Calm the trigger first, keep treatment conservative |
| Superficial marks with stable skin | Topicals, then peels if needed |
| PIH with textural change or post-acne unevenness | Consider microneedling if the skin is suitable |
| Easily reactive skin or strong PIH history | Lower-inflammatory routes and slower progression |
In real consultations, the best plan is often less dramatic than clients expect. We may ask for a period of disciplined home care first, then review. That isn't delay for the sake of it. It's risk management.
Your Treatment Journey Timelines and Prevention
PIH responds on skin time, not wishful thinking. The biggest shift for most clients is accepting that fading pigment and preventing new marks have to happen together. If we fade old marks while new inflammation keeps arriving, progress never feels complete.
A realistic early phase is about discipline. Proper sunscreen every day, a controlled home routine and better management of the original trigger. If acne, eczema, friction or picking continues, the skin keeps writing new pigment while you're trying to erase the old.
What progress usually looks like
The first stretch often feels quiet. Skin may look calmer before it looks dramatically lighter. That's still useful progress because stable skin gives us more room to treat safely.
If marks remain stubborn after an initial home phase, we may consider adding in-clinic work. This is also where expectations need to stay grounded. Improvement can be meaningful without being instant or perfectly even from one week to the next.
A practical guide to pacing treatment can help, especially if you're considering collagen induction alongside pigment management. Our article on how long it takes to see results from microneedling gives a useful frame for that side of treatment planning.
Prevention is the long game
The most effective long-term “treatment” for PIH is often not a stronger brightening cream but tighter control of the original inflammation combined with strict daily photoprotection using a broad-spectrum SPF 50+ sunscreen, even on cloudy UK days, as noted by DermNet's guidance on post inflammatory hyperpigmentation.
That principle changes how we manage skin long term. We don't just ask how to fade marks. We ask why your skin is making them in the first place.
The maintenance habits that matter most
- Control the trigger. Acne, ingrown hairs, eczema and repeated irritation need active management.
- Protect exposed skin daily. Don't reserve SPF for hot weather or holidays.
- Treat procedures with respect. Aftercare matters. Over-cleansing, picking flaking skin or returning to actives too soon can prolong pigment.
- Review before escalating. If the skin is reactive, adding more isn't always wise.
Prevention usually looks less exciting than treatment, but it's where the best long-term outcomes are built.
Once clients understand that, results tend to become more stable. The goal isn't just lighter marks for a month. It's fewer fresh ones appearing in the first place.
Frequently Asked Questions About PIH
Can post inflammatory hyperpigmentation be permanent
Some PIH fades well and some lingers for a long time. Superficial epidermal marks usually respond better than deeper dermal pigment. When pigment sits deeper, it can persist for a long time and needs a more careful plan. That's why early, appropriate treatment matters.
What is the best treatment for darker skin tones
There usually isn't one single best treatment. For darker skin tones, the safest and most effective plan is often the one that controls inflammation carefully, builds tolerance with topical treatment and introduces procedures selectively. The wrong aggressive treatment can create more pigment, so caution matters.
Why does PIH keep coming back
Usually because the trigger hasn't really stopped. If acne is still active, if the skin is being picked, if friction keeps recurring or if aftercare is poor, new marks keep forming. In many cases, recurrence isn't a failure of the pigment treatment. It's a sign that the source problem still needs work.
Is PIH the same as melasma
No. They can both look like pigmentation, but they behave differently. PIH follows inflammation. Melasma is often more diffuse or symmetrical and can be influenced by hormones, heat and light exposure. Treating one as if it were the other often leads to frustration.
Should we use peels or microneedling straight away
Not always. If the skin is still inflamed or highly reactive, starting with procedures can be the wrong move. We usually want the barrier settled and the home routine consistent first, then we can decide whether a clinic treatment is likely to help or add more irritation.
Can we just use a strong brightening cream and skip everything else
Usually not. PIH responds best when the whole chain is addressed. That means the trigger, the barrier, the sunscreen habit and then the chosen active treatment. A pigment cream used on skin that is still being inflamed every week rarely gives satisfying results.
Your Path to Clearer Skin with Skin Revision
PIH can be stubborn, but it is manageable with the right sequence. Calm the cause. Protect the skin daily. Use proven topical treatment consistently. Escalate carefully when the skin is stable enough to benefit.
At Skin Revision, we take that practical route because it's how real progress usually happens. Jacqui Bannister, our multi award-winning paramedical skin therapist with more than 20 years of experience, and Sarra Kourdi, our advanced skin therapist, build plans around skin behaviour rather than quick fixes.
Our clinic is based at 9a Burkes Parade, Station Road, Beaconsfield HP9 1NN. We regularly see clients from Beaconsfield, Gerrards Cross, Amersham, High Wycombe, Marlow, Slough and the wider parts of Buckinghamshire, Berkshire and Hertfordshire who want a safer, more realistic plan for acne marks and pigmentation.
If you're tired of trying random products and want a clear treatment path, book a consultation so we can assess the type of pigmentation, identify the trigger and recommend the most suitable next steps.
If you'd like personalised advice, book a consultation with Skin Revision. We'll assess your skin properly, explain whether you're dealing with post inflammatory hyperpigmentation or another type of pigmentation and create a treatment plan that fits your skin, your history and your goals.
