Hyperpigmentation: Causes and Treatment Options

Hyperpigmentation is one of the most common reasons people seek advice about their skin. It describes areas of skin that appear darker than the surrounding skin and can affect the face, neck, chest, hands and other areas of the body.

Although pigmentation is usually harmless, it can be persistent and sometimes difficult to manage. Understanding why the pigmentation has developed is an important first step in deciding which treatment approach may be appropriate. In this guide, we explain the common causes of hyperpigmentation and the treatment options that may be considered.

What causes hyperpigmentation?

Skin colour is largely determined by melanin, a pigment produced by specialised cells called melanocytes. Melanin helps protect the skin from ultraviolet (UV) radiation.

Hyperpigmentation occurs when there is an increase in melanin production or an uneven distribution of pigment within the skin.

Common causes include:

Sun exposure

UV radiation is one of the most important causes of pigmentation. Repeated sun exposure stimulates melanin production and can result in sun spots, age spots and uneven skin tone.

Cumulative UV exposure also contributes to other signs of skin ageing, including fine lines, wrinkles and changes in skin texture.

Melasma

Melasma is a common pigmentation disorder that causes irregular brown or grey-brown patches, particularly on the face.

It is often influenced by a combination of hormonal factors, UV exposure and visible light. Melasma can be particularly challenging because it may recur even after successful treatment.

Post-inflammatory hyperpigmentation

Pigmentation can develop following inflammation or injury to the skin. This is known as post-inflammatory hyperpigmentation (PIH).

It can occur after:

• Acne

• Eczema or dermatitis

• Skin infections

• Burns or injuries

• Certain cosmetic procedures

The pigmentation can persist after the original inflammation has resolved.

Hormonal changes

Hormonal changes can influence melanin production and are particularly relevant to melasma. Pregnancy, hormonal contraception and other hormonal influences may contribute to the development or worsening of pigmentation in susceptible individuals.

Ageing

As we get older, cumulative sun exposure can become increasingly visible as areas of uneven pigmentation and age spots.

Not all pigmentation is the same

An important part of managing pigmentation is identifying what type of pigmentation is present.

For example, sun-induced pigmentation, melasma and post-inflammatory hyperpigmentation have different underlying mechanisms and may respond differently to treatment.

A new or changing pigmented lesion should also not automatically be assumed to be cosmetic pigmentation. Moles or other pigmented lesions that are new, changing, asymmetrical, irregular or otherwise concerning should be medically assessed before cosmetic treatment is considered.

How Is Hyperpigmentation Treated?

There is no single treatment that is suitable for every type of pigmentation. Treatment may involve a combination of sun protection, medical skincare and, in selected cases, procedures.

The appropriate approach depends on the cause, depth and distribution of the pigmentation, as well as the individual's skin type and sensitivity.

Sun protection

Effective sun protection is fundamental to managing hyperpigmentation.

Daily use of a broad-spectrum sunscreen can help reduce further UV-induced pigmentation and is particularly important when treating existing pigmentation.

For people prone to melasma or pigmentation, consistent sun protection is often an essential part of maintaining treatment results.

Other measures such as seeking shade, wearing a hat and avoiding unnecessary intense sun exposure can also help.

Medical skincare

Medical skincare can play an important role in the management of hyperpigmentation.

Obagi Medical® is a physician-dispensed skincare range that includes products and structured skincare programmes designed to address concerns including hyperpigmentation, uneven skin tone and photodamage.

Different Obagi products contain different active ingredients, allowing skincare to be tailored to the individual's skin and the type of pigmentation being addressed.

Depending on the programme, ingredients may include:

Vitamin C- Vitamin C, particularly L-ascorbic acid, is an antioxidant that can be incorporated into skincare programmes addressing uneven skin tone and the visible effects of environmental exposure.

Arbutin- Arbutin is a pigment-modulating ingredient used in some Obagi formulations and can form part of a skincare approach to uneven pigmentation.

Retinoids and retinol- Vitamin A derivatives influence epidermal turnover and are widely used in dermatology for concerns including pigmentation, uneven texture and photoageing. Some retinoid preparations are prescription-only.

Exfoliating acids- Ingredients such as glycolic acid can help remove superficial dead skin cells and improve the appearance of skin texture and tone.

Hydroquinone- Hydroquinone is a potent pigment-modulating medicine that has been used for hyperpigmentation. Certain Obagi formulations containing hydroquinone are prescription products and require appropriate medical assessment and prescribing.

Why choose a structured skincare programme?

Pigmentation often develops over a prolonged period, so treatment is rarely about a single product used for a few days.

A structured skincare programme can combine different active ingredients while taking account of the skin's tolerance and the underlying pigmentation.

It is also important to avoid excessively aggressive treatment. Skin irritation can sometimes worsen pigmentation, particularly in people prone to post-inflammatory hyperpigmentation.

For this reason, a gradual, supervised approach may be preferable to simply using the strongest available products.

Can pigmentation be permanently removed?

It is more realistic to think of hyperpigmentation as something that can often be managed rather than permanently cured.

Even when pigmentation improves considerably, the underlying tendency may remain. Continued UV exposure, hormonal influences or inflammation can cause pigmentation to return.

This is particularly relevant with melasma, which is generally regarded as a chronic condition requiring ongoing management.

A maintenance skincare routine and consistent sun protection can therefore be just as important as the initial treatment.

How long does hyperpigmentation treatment take?

The timeframe varies considerably depending on the cause and severity of the pigmentation.

Some superficial pigmentation may begin to improve over several weeks, while more established pigmentation can take considerably longer.

Melasma and post-inflammatory hyperpigmentation may require a longer-term approach, with treatment adjusted according to the response and any irritation.

It is important to have realistic expectations and understand that gradual improvement is often preferable to aggressive treatment that risks causing further inflammation.

Why is a medical consultation important?

Before treating pigmentation, it is important to establish what is actually causing it.

During a consultation, a clinician may consider:

• The appearance and distribution of the pigmentation

• When it first developed

• Previous skin conditions or inflammation

• Sun exposure

• Hormonal factors

• Current skincare

• Previous cosmetic treatments

• Skin type and sensitivity

• Any medications or relevant medical conditions

This assessment can help determine whether medical skincare is appropriate and whether further investigation is required.

Obagi Medical® at Oxford Cosmetic Clinic

At Oxford Cosmetic Clinic, we take a doctor-led approach to medical skincare.

We assess the skin before recommending an appropriate skincare programme. Where suitable, Obagi Medical® skincare can form part of a personalised approach to hyperpigmentation, melasma, sun damage and uneven skin tone.

Some Obagi products are available without prescription, while others contain prescription medicines and require an appropriate medical consultation and prescription.

The aim is to develop a structured skincare programme appropriate for the individual's skin, rather than simply selecting products based on their strength or popularity.

Looking after pigmentation in the long term

Successful management of hyperpigmentation involves more than treating existing dark patches. Sun protection, appropriate skincare and understanding the underlying cause are all important.

If you are concerned about pigmentation, a medical assessment can help determine whether it is suitable for treatment and which approach may be appropriate.

This article is for general information only and does not constitute individual medical advice. Prescription-only medicines are only supplied following an appropriate clinical assessment and prescription where clinically indicated.