Key Takeaways
- PCOS can cause skin darkening.
- Acanthosis nigricans can cause dark, thick skin.
- Insulin resistance is a common link.
- Dark patches often appear on skin folds.
- New or spreading pigmentation needs a doctor's advice.
Have you noticed darker skin on your neck, underarms or other skin folds after developing PCOS? PCOS can cause dark patches on the neck, underarms and other areas where skin folds. This skin change is called acanthosis nigricans, where the skin becomes darker, thicker and velvety. This change is often linked to insulin resistance, a common concern in PCOS.
So, if you have noticed PCOS skin darkening, there may be more to it than a change in skin colour. We will explain why it happens, what it looks like, and what you can do about it. It is often seen around the neck, underarms, groin and other skin folds.
Can PCOS Cause Skin Darkening?
Yes, PCOS can be linked to skin darkening. A common example is acanthosis nigricans, which causes darker, thicker and velvety skin.
When the body does not respond well to insulin, insulin levels can rise. This skin change is often linked to insulin resistance. In some women, this can affect the skin and lead to darker, thicker patches.
If you have PCOS and see these changes, we suggest consulting with your doctor. The skin change may be a sign that your blood sugar and insulin levels need attention.
Why Does PCOS Cause Skin Darkening?
PCOS-related skin darkening is often linked to insulin resistance. When your body does not use insulin properly, it may produce more insulin to keep your blood sugar in range. Higher insulin levels can affect skin cells, causing them to grow more than usual. This can make certain areas of your skin look darker and thicker.
Where Does PCOS Skin Darkening Appear?
PCOS-related darkening can show up in places where skin rubs together or forms folds.
Common areas include:
- Neck: A dark patch may develop along the back or sides.
- Underarms: The skin can become darker and thicker.
- Groin: Pigmentation may appear around the inner thighs or groin folds.
- Inner thighs: Friction and skin folds can make the colour change more visible.
- Elbows and knees: Darker patches may occur in some people.
Darkening that comes with thicker or velvety skin can be a sign of acanthosis nigricans.
Why Is the Neck Often Affected?
The neck is a common place for acanthosis nigricans to appear because it has natural skin folds where this change can become visible. You may first notice a darker band or patch around the back or sides of your neck.
The skin may also feel different from the surrounding area:
- Darker colour
- Thicker texture
- Soft, velvety feel
- More visible skin lines
If the skin on your neck has become darker and thicker, we suggest mentioning it during your next medical check-up.
Is PCOS Skin Darkening Always Acanthosis Nigricans?
No, not every case of skin darkening in a woman with PCOS is acanthosis nigricans. PCOS can occur along with other skin concerns, and pigmentation can have different causes.
Acanthosis nigricans typically has a few clear features:
- The skin becomes darker than the surrounding area.
- It may feel thicker or softer than usual.
- The surface can have a velvety texture.
- It often develops around the neck, underarms or groin.
If your skin has only changed colour without becoming thicker or velvety, it may not be acanthosis nigricans.
A doctor or dermatologist can look at the skin and help find the reason.
How Can You Manage PCOS Skin Darkening?
There is no single cream or home remedy that works for every case of PCOS skin darkening. The right method depends on what is causing the change. We suggest looking after your PCOS and your skin at the same time.
Focus on Your Overall PCOS Management
Since insulin resistance can be linked with acanthosis nigricans, taking care of your metabolic health matters.
Healthy eating and regular physical activity are part of PCOS care and can support better metabolic health. These habits can be useful even when weight loss is not your goal.
You can start with simple habits that fit your routine:
- Choose balanced, nutritious meals.
- Stay physically active on most days.
- Follow the treatment advised by your doctor.
- Get blood sugar checks when your doctor recommends them.
- Avoid focusing only on the number on the weighing scale.
Take Care of the Darkened Skin
Be gentle with the affected area. Scrubbing harder will not remove acanthosis nigricans and may irritate your skin.
The American Academy of Dermatology also advises checking with a dermatologist before using bleaching creams or exfoliating products, as these may irritate the skin and make the problem worse.
For day-to-day care:
- Wash the area gently.
- Avoid harsh scrubs and rubbing.
- Do not use unverified bleaching remedies.
- Keep the skin moisturised.
Ask a dermatologist about treatment if the patches remain or bother you.
If the darkening appeared quickly, is spreading, or you are not sure what is causing it, please get it checked by a dermatologist.
When Should You See a Doctor?
If you have PCOS and notice early signs of dark patches on your skin, it is worth mentioning them to your doctor. This is more important when the skin becomes thicker, develops a velvety texture or the darkening continues to spread. Your doctor can assess the skin and decide whether blood sugar or other health checks are needed. If you are unsure whether the pigmentation is related to PCOS, a dermatologist can also examine the affected area and help identify the cause.
Summary
Seeing darker skin with PCOS can be worrying, but it does not mean that something is seriously wrong with your skin. The change may also be linked to insulin resistance and may appear as acanthosis nigricans around the neck, underarms or other skin folds.
We suggest giving attention to both your PCOS and your skin. If the dark patches keep changing, spread to new areas or do not look like your usual skin, then you should contact your doctor immediately.
If you are also looking for period-care support while managing PCOS, you can explore our PCOS Period Kit.
References
- National Institute of Child Health and Human Development. (n.d.). What are the symptoms of PCOS? National Institutes of Health. https://www.nichd.nih.gov/health/topics/pcos/conditioninfo/symptoms
- National Institute of Child Health and Human Development. (n.d.). What causes PCOS? National Institutes of Health. https://www.nichd.nih.gov/health/topics/pcos/conditioninfo/causes
- American Academy of Dermatology Association. (n.d.). Acanthosis nigricans: Overview. https://www.aad.org/public/diseases/a-z/acanthosis-nigricans-overview
- Hermanns-Le, T., Scheen, A., & Piérard, G. E. (2004). Acanthosis nigricans associated with insulin resistance: Pathophysiology and management. American Journal of Clinical Dermatology, 5(3), 199–203. https://doi.org/10.2165/00128071-200405030-00008
Comments