Red-Brown Discolouration on the Neck: Poikiloderma Explained

A mottled red-brown patch on the sides of the neck, often with a pale band left untouched under the chin, is usually a sun-related change called poikiloderma of Civatte. It is harmless, but it tends to be stubborn. Gentle laser treatment that addresses both the redness and the brown pigment can soften it over several sessions, and daily sun protection is what keeps it from returning.

What poikiloderma of Civatte looks like

The word poikiloderma describes skin with three features mixed together: redness from small visible blood vessels, brown pigment, and a slightly thin, finely wrinkled texture. Civatte was the French dermatologist who described the pattern in the 1920s.

It typically appears on both sides of the neck and sometimes extends onto the upper chest in a V shape. A classic clue is the area just under the jaw and chin that stays its normal colour, because the jaw shades it from the sun. The patches do not usually hurt, though some people notice mild itching or a feeling of tightness. It is most often seen in fair-skinned adults in mid-life and beyond, and is more common in women.

Why it happens

Long-term ultraviolet exposure is the main cause. Over years, sunlight thins the skin of the neck, damages the support around tiny vessels so they widen, and stimulates uneven pigment. The neck is often missed when people apply sunscreen, and it gets plenty of sun while driving, walking or working outdoors.

Other factors may add to it:

• Fair skin and a family tendency
• Perfumes and fragranced products sprayed on the neck, which can react with sunlight
• Hormonal changes, including around menopause
• Natural thinning of neck skin with age

Making sure it is poikiloderma

Other conditions can cause redness or discolouration on the neck, including contact dermatitis, eczema, fungal infection, and, less commonly, autoimmune conditions such as lupus or dermatomyositis. Mottled skin in unusual places, or with muscle weakness, joint pain, fatigue or rash elsewhere, should be assessed by your family doctor. A brief examination usually confirms the diagnosis before any cosmetic treatment is planned.

Why treatment needs to be gentle and combined

Because poikiloderma includes both redness and pigment, treating only one part tends to leave the patch looking uneven. At the same time, neck skin is thinner than facial skin, has fewer oil glands to help it heal, and is more prone to scarring and pigment changes if laser energy is too strong. A cautious, staged approach is the norm.

With the Fotona system, the vascular component can be treated with the Nd:YAG wavelength (1064 nm), which targets haemoglobin in the small vessels. Brown pigment and texture can be approached with light, superficial Er:YAG treatment (2940 nm), which removes a very thin surface layer or gently heats the skin. Settings are kept low and are often adjusted from session to session as the skin responds. A small test area may be done first.

Results usually build gradually over two to four or more sessions, spaced about four to six weeks apart. Many people see a softer, more even tone, though complete clearing is uncommon, and results vary from person to person.

Sun protection: the most important step

Without sun protection, poikiloderma typically continues to progress, and any improvement from laser can fade. A broad-spectrum sunscreen, SPF 30 or higher, applied to the neck and upper chest every morning and reapplied when outdoors, is the foundation. Scarves, collars and shade add protection, and tinted mineral sunscreens may offer extra shielding from visible light. Our article on sunscreen year-round in Nova Scotia has practical tips.

It also helps to apply perfume to clothing rather than skin. Gentle skincare with ingredients such as a retinoid at night or a vitamin C serum in the morning may help with tone, but they should be introduced carefully, since neck skin irritates easily.

What recovery looks like

After a session, the neck may be red and mildly swollen for a day or two. Brown spots can darken and flake over about a week. Bruising occasionally appears where vessels were treated. Most people return to normal activities right away, with care to keep the area out of the sun and to avoid harsh products, tight collars or heavy rubbing for a few days.

Who should not have it, or should wait

Treatment may not be suitable, or may need to be delayed, if you:

• Have a tan, recent sunburn or recent self-tanner on the neck
• Are pregnant
• Have active eczema, infection or irritation in the area
• Have a history of keloid scars or have recently taken isotretinoin
• Take medicines that increase light sensitivity
• Have unexplained redness that has not been assessed

Tell your clinician about all medications, including blood thinners; do not stop any prescription on your own.

Risks and side effects

Possible effects include redness, swelling, bruising and temporary darkening. Less common but important risks on the neck include blistering, lasting light or dark patches, a striped or uneven appearance, and scarring. Conservative settings and spacing sessions out help reduce these risks.

Frequently asked questions

Is poikiloderma a sign of skin cancer?

No, it is not a cancer. It does indicate significant past sun exposure, so it is a good reason to check the rest of your skin regularly.

Can creams alone fix it?

Creams and sunscreen can stop it from worsening and may lighten some pigment, but they do little for visible vessels. Many people find a combination works better than either alone.

Can I get it treated in summer?

It is usually better to treat during fall and winter, when the neck is less exposed to strong sun.

Can the neck also be tightened?

Texture and laxity are separate concerns. See Laser for Neck Skin Laxity and Crepey Texture for that topic.

Moving forward

If the colour on your neck has been bothering you, HealthPark Medical Aesthetics can offer a consultation to confirm what it is, discuss whether a cautious laser plan makes sense, and explain the likely number of sessions, risks and fees before any treatment.