Acanthosis Nigricans Diagnosis & Treatment in London
Acanthosis nigricans causes darker, thicker, velvety skin in body folds such as the neck, armpits and groin. At Skinhorizon Clinic in Maida Vale, our consultant dermatologist-led approach looks at both the skin changes and possible underlying drivers, including insulin resistance, hormonal factors and friction.
Reviewed by Dr Mohammad Ghazavi, Consultant Dermatologist. CQC-registered clinic
Private dermatology care in Maida Vale, London. Personalised plans
Skin, lifestyle and underlying health factors considered together. Central London access
Convenient for St John’s Wood, Paddington and West London.
What is acanthosis nigricans?
Acanthosis nigricans is a skin condition that causes darker, thicker, soft “velvety” patches, most commonly in body folds. It is usually harmless itself, but it can be a visible marker of insulin resistance, hormonal conditions, medication effects or friction. Sudden, widespread onset in adults should be assessed promptly.
Acanthosis nigricans at a glance
| What is Acanthosis Nigricans? | A skin condition causing darker, thicker, velvety patches in body folds such as the neck, armpits, under the breasts and groin. |
|---|---|
| Key signs of Acanthosis Nigricans | Brown to grey-brown patches, soft thickening, accentuated skin lines, mild itch or odour, and sometimes skin tags. |
| Who gets Acanthosis Nigricans? | Children and adults. It is more common with insulin resistance, higher body weight, PCOS, hormonal conditions or certain medicines. |
| Why Acanthosis Nigricans matters | It can signal underlying metabolic or hormonal factors. Rarely, sudden severe onset in adults may indicate internal disease and needs urgent assessment. |
| Treatment options for Acanthosis Nigricans | Managing underlying drivers, barrier-friendly skincare, keratolytics, topical retinoids, peels, pigmentation treatment, lasers where suitable and skin tag removal if needed. |
| Appointments | 7 days a week (subject to availability). |
Understanding acanthosis nigricans
Acanthosis nigricans is a common condition where skin in body folds becomes darker, thicker and softly velvety. It most often affects the back and sides of the neck, armpits, under the breasts, the groin, and sometimes the knuckles or elbows.
Acanthosis nigricans itself is usually harmless. However, it is often a marker that the body may be responding to hormones, weight-related factors, medicines or, less commonly, internal disease. For many patients, addressing the underlying driver alongside measured skin treatments brings both cosmetic improvement and reassurance.
Why does acanthosis nigricans happen?
Insulin resistance
Often seen in people with higher body weight, metabolic syndrome, pre-diabetes or type 2 diabetes.
Endocrine factors
Conditions such as PCOS and some endocrine disorders can contribute to the skin changes.
Medicines or genetics
Some medicines can trigger similar changes. Rare familial forms can appear in childhood.
Rare but important: sudden onset in adults
A rapid, extensive onset in an adult, especially with unexplained weight loss, generalised itch or mouth/palm involvement, requires prompt medical assessment to exclude rare internal causes.
Get expert help for acanthosis nigricans
Address cosmetic concerns while also considering possible hormonal or metabolic triggers with a tailored consultant-led dermatology plan.
What we assess at your visit
Diagnosis is usually straightforward based on appearance and distribution. During consultation we consider timing of onset, progression, family history, symptoms, friction factors, medication history and possible metabolic or hormonal risk.
In most cases, no biopsy is required. If the pattern is atypical, unusually thick or changing rapidly, a small sample may be considered to confirm the diagnosis and exclude other conditions. Where appropriate, we may advise relevant blood tests through your usual healthcare pathway.
Treatment principles for acanthosis nigricans
Address underlying drivers
If insulin resistance is likely, sustainable weight management, balanced nutrition and physical activity can reduce the hormonal signals that thicken and darken the skin.
Medical skincare
Keratolytics, topical retinoids, azelaic acid, niacinamide and barrier-friendly emollients may help smooth texture and improve tone when introduced gradually.
In-clinic procedures where suitable
Selected patients may benefit from superficial peels, hyperpigmentation treatment, cautious laser treatment such as fractional CO₂ laser or vascular and pigmentation laser, and skin tag removal where tags are catching or irritated.
Self-care and prevention
Reduce friction
Choose breathable fabrics, well-fitting clothing and anti-chafing support in warm weather.
Gentle cleansing
Avoid harsh scrubs. Use pH-balanced washes and moisturisers that support the skin barrier.
Sun protection
Sunscreen helps prevent additional darkening in exposed areas. Read more about sun damage.
What results can I expect?
Many patients notice smoother texture within weeks of starting a combined plan. Colour improvement is usually more gradual and may continue over several months. Long-standing cases need maintenance, especially if underlying metabolic or friction-related factors continue.
Because acanthosis nigricans reflects the skin’s response to internal signals, results are most durable when underlying drivers are addressed alongside topical or in-clinic treatment.
Why choose Skinhorizon Clinic?
Consultant dermatologist-led care
Your assessment is reviewed by Dr Mohammad Ghazavi, Consultant Dermatologist, with attention to diagnosis, safety, skin type and underlying health factors.
CQC-registered private clinic
Skinhorizon Clinic provides private dermatology care in Maida Vale, London, with convenient access from St John’s Wood, Paddington, West London and Central London.
Balanced medical and cosmetic planning
We focus on both why the condition has developed and how to improve the appearance, texture and comfort of the affected skin safely.
Your first visit — what to expect
Assessment
History, examination and documentation of pattern, severity and possible triggers.
Plan
A staged programme combining skincare and, where appropriate, in-clinic procedures.
Support
Guidance on friction reduction, product use and realistic treatment timelines.
Follow-up
Review progress, adjust strengths or intervals and plan maintenance.
Dr Mohammad Ghazavi
Consultant Dermatologist
Skinhorizon Clinic, 4 Clarendon Terrace, Maida Vale, London W9 1BZ.
Last reviewed:
Frequently asked questions
Is acanthosis nigricans a sign of diabetes?
Can acanthosis nigricans be cured?
How long will it take to see results?
Is treatment safe for sensitive areas like the neck and armpits?
Do children get acanthosis nigricans?
When should I worry about cancer?
Take the first step towards smoother, clearer-looking skin
Personalised consultant-led care can help improve comfort, texture and pigmentation while considering the underlying reasons acanthosis nigricans has developed.