Post-inflammatory hyperpigmentation can look like a straightforward pigmentation concern. A client develops a dark mark following acne, inflammation, injury or a professional skin treatment, so the obvious response is to choose ingredients or procedures designed to fade pigment.

But post-inflammatory hyperpigmentation - commonly known as PIH - isn’t simply excess pigment. It is part of the skin’s response to inflammation and injury. If we concentrate only on lightening the visible discolouration without considering why it developed, we risk overlooking the condition of the skin beneath it.

In some cases, an overly aggressive approach can create further inflammation, prolong recovery and potentially make the pigmentation worse.

For beauty and aesthetic practitioners, treating PIH effectively begins with understanding the skin - not simply selecting the strongest pigmentation treatment available.

What is post-inflammatory hyperpigmentation?

Post-inflammatory hyperpigmentation is the discolouration that can remain after the skin has experienced inflammation or injury. It may appear as flat brown, grey-brown, purple or darker patches in the area previously affected.

Common causes include:

• Acne and inflamed breakouts
• Picking or squeezing spots
• Eczema, dermatitis and other inflammatory skin conditions
• Burns, cuts and other injuries
• Friction or repeated irritation
• Insect bites
• Chemical peels
• Microneedling
• Laser or intense pulsed light treatments
• Other procedures that create a controlled skin injury

During inflammation, chemical messengers can stimulate melanocytes - the cells responsible for producing melanin. This is a protective response, but some individuals produce more pigment than others or retain that pigmentation for considerably longer.

PIH can affect all skin tones, although it is generally more common, noticeable and persistent in darker skin phototypes.

Not all post-inflammatory pigmentation is the same

The colour and depth of the pigmentation can influence how quickly it may improve.

When excess pigment remains within the epidermis, the mark is often brown and may gradually fade as epidermal cells move towards the surface and are shed.

If inflammation has disrupted the junction between the epidermis and dermis, pigment can be deposited more deeply. This is sometimes called pigment incontinence. Deeper pigmentation may have a greyer or blue-grey appearance and can be considerably slower and more difficult to improve.

This is one reason practitioners should avoid promising that a particular product or course of treatments will completely remove a client’s pigmentation. Without an appropriate assessment, the practitioner may not know how deeply the pigment is situated - or whether the discolouration is PIH at all.

New, changing, irregular or unexplained pigmentation should not be cosmetically diagnosed or treated. The client should be referred to an appropriate medical professional for assessment.

Why aggressive pigment treatment can backfire

When a client is distressed by a dark mark, both the client and practitioner may feel pressure to act quickly. This can lead to stronger acids, frequent exfoliation, aggressive microneedling or unsuitable laser and light-based treatment parameters.

Unfortunately, more treatment does not necessarily produce faster results.

If the skin remains inflamed, sensitised or barrier-impaired, an aggressive treatment can create another inflammatory response. Because inflammation is the process that contributed to the pigmentation in the first place, this can potentially deepen the existing discolouration or create further PIH.

This is particularly important when treating darker skin phototypes or clients with a history of pigmentation following inflammation or injury.

The question should not simply be “What can we use to lighten this mark?”

It should be “What does this skin need at its current stage of recovery?”

Begin with consultation and risk assessment

A thorough consultation allows the practitioner to consider:

• The event or condition that caused the pigmentation
• When the pigmentation appeared
• Whether the original inflammation is still active
• The current condition of the skin barrier
• The client’s skin phototype
• The colour and apparent depth of the pigmentation
• Previous reactions to skincare products or treatments
• Current medication and medical conditions
• Recent sun and heat exposure
• The client’s homecare routine
• Previous professional treatments
• Any history of persistent or rebound pigmentation

Risk assessment does not mean refusing to treat every client who may be susceptible to PIH. It means using the information gathered to decide whether treatment is appropriate, how the skin should be prepared and how cautiously treatment should progress.

It also helps the practitioner give the client an honest prognosis rather than making promises that cannot be guaranteed.

Phase one: calm, protect and support

Aggressive pigment correction should not be performed over an open wound or actively inflamed skin. Once the skin has safely re-epithelialised, the initial priority may still need to be recovery rather than correction.

Depending upon the practitioner’s qualifications and scope of practice, early support may include:

• Gentle, non-stripping cleansing
• Barrier-supporting skincare
• Avoidance of scrubs and unnecessary exfoliation
• Reducing friction and other sources of irritation
• Carefully selected antioxidant or soothing ingredients
• Avoiding excessive heat exposure
• Consistent broad-spectrum sun protection

Products should be selected according to the client’s skin condition and tolerance. An ingredient may have useful properties, but its concentration, formulation, frequency of use and timing will determine whether it supports the skin or irritates it.

Photoprotection is part of the treatment

Sun protection is not an optional recommendation added at the end of a pigmentation consultation. It is a fundamental part of managing and preventing PIH.

Ultraviolet radiation can stimulate melanocyte activity and contribute to persistent pigmentation. Visible light may also influence hyperpigmentation, particularly in darker skin phototypes. Tinted sunscreens containing iron oxides can provide additional protection against visible light.

Clients should also understand that sunscreen cannot compensate for unlimited exposure. Shade, hats, protective clothing and avoiding intense sun and heat all have a role - especially while the skin is recovering.

A practitioner can perform an excellent treatment, but if the client repeatedly exposes vulnerable skin to intense sunlight without adequate protection, the results will inevitably be compromised.

Phase two: progressive pigment correction

Once inflammation has settled and the skin barrier is stable, a more corrective approach may be introduced gradually.

Depending on the client and the practitioner’s qualifications, this might include carefully selected pigment-regulating ingredients, antioxidants, retinoids, exfoliating acids, professional peels, microneedling or laser and light-based treatments.

The objective is not to use everything at once. It is to select and sequence interventions according to:

• Skin phototype
• Sensitivity and tolerance
• Pigment depth
• Current barrier function
• Previous treatment response
• Risk of renewed inflammation
• The practitioner’s training and scope of practice

Professional procedures should form part of a considered treatment journey rather than being delivered as isolated attempts to attack the pigment.

Realistic expectations matter

PIH rarely disappears overnight. Epidermal pigmentation may improve over several weeks or months, while deeper pigment can take considerably longer and may prove more resistant.

Clients need to understand that gradual improvement does not mean the treatment is failing. Attempting to accelerate the process by increasing treatment intensity too quickly can cause irritation and set the skin’s recovery back.

Photographs taken under consistent lighting, regular reviews and accurate treatment records can help both the client and practitioner assess progress objectively.

Competence is about making decisions

Knowing how to perform a peel, microneedling treatment or laser procedure is only one part of professional competence.

A competent practitioner must also know:

• When the treatment is appropriate
• When the skin is not ready
• How to adapt the treatment safely
• What preparation and aftercare are required
• How to recognise an adverse response
• When to stop
• When to refer

Successful management of post-inflammatory hyperpigmentation isn’t about finding one miracle ingredient or delivering the most aggressive treatment the skin can tolerate.

It is about understanding inflammation, respecting the skin barrier, assessing risk, selecting the correct treatment at the correct time and preventing the treatment itself from becoming another source of injury.

Because when we treat only the pigment, we see only the mark. When we understand the healing process behind it, we can make safer, more informed and more effective treatment decisions.

At Jane Bryan Beauty Training, our courses focus on more than following a treatment protocol. We help practitioners develop the underpinning knowledge, practical competence and clinical judgement needed to treat clients safely and confidently.

Develop the confidence to treat skin safely

Effective skin treatments require more than knowing how to follow a protocol. You need to understand the skin, recognise risk, select the right treatment and know when not to proceed.

At Jane Bryan Beauty Training, our courses combine detailed underpinning knowledge with hands-on practical training, helping you develop genuine competence—not simply collect another certificate.

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