Why are My Inner Thighs Dark? Could it Be a Sign of PCOS?

Inner Dark Thighs and PCOS

Dark inner thighs, or skin discoloration around the groin and pubic area, are normal and relatively common. 


In some cases, however, dark inner thighs may occur alongside symptoms of polycystic ovary syndrome (PCOS) and may cause distress or discomfort or make someone self-conscious.


If you’re seeing thickened, dark skin in several areas of your body, like your inner thighs, underarms, breasts, and the back of your neck, you may be dealing with a condition medically known as “Acanthosis Nigricans.” 


This condition is common among women with PCOS (although not exclusive to those with PCOS)—and it’s most commonly described as skin discoloration that commonly occurs in skin folds.


Those of us with PCOS are unfortunately all too familiar with the feeling of dread that may accompany looking at the changes in our bodies, especially if we’re newly diagnosed. 


There’s nothing to be ashamed of, however.


Although dealing with PCOS-related skin issues like acne, skin tags, and hirsutism (excess hair growth) can often feel frustrating, know that there are ways to remedy these issues. 


Most importantly, you’re not alone—thousands of “cysters” around the world are dealing with PCOS and finding ways to triumph over their unique symptoms. 


You can, too!


With the right PCOS treatment plan, not only can you address pesky skin issues like acne and discoloration, but also kick other symptoms to the curb and naturally support your body. 


In this blog, we’re going on a deep dive into why exactly PCOS dark inner thighs happen and what you can do to address this.


Let’s begin!

What is PCOS?

PCOS is an abbreviation for Polycystic Ovary Syndrome. 

Here’s a spoiler, though: The jury’s still out on whether it should really be called “PCOS” because, apparently, not everyone with the condition automatically has ovarian cysts.

So, point number one: Having PCOS doesn’t automatically mean that your ovaries are filled with cysts. (More on that later.) 

Rather, PCOS is a syndrome, which means that it is a group of symptoms—rather than a singular disease.

Primarily, these symptoms are related to the overproduction of androgens (male hormones like testosterone) in the body, which may then lead to symptoms such as acne, irregular periods, thinning scalp hair, weight issues, and facial hair growth.

Now, onto the “cyst” debate. 

They’re loosely called such but are actually underdeveloped follicles that might be visible in pelvic ultrasounds of women with PCOS. 

Briefly put, these are “baby eggs” that attempted to grow but, due to hormonal fluctuations brought about by PCOS, didn’t grow to become fully mature eggs to be released during ovulation.

The body usually tries several times until it can successfully grow a mature egg, and this is why when you have PCOS, you may often have a much longer cycle (35 days or more)—or may miss a couple of periods at times. 

That being said, some women with PCOS don’t have these “polycystic” ovaries but may be diagnosed due to other symptoms, such as hyperandrogenism based on blood tests and physical symptoms like acne and excessive hair growth.

How Does PCOS Affect Skin Health?

Researchers have found that PCOS may cause several skin issues, with hirsutism and acne being the most common ones. 

In a study done by a group of researchers on 100 women diagnosed with PCOS, the following issues have been identified from most common to least common:

  • Hirsutism (78%)

  • Acne (48%)

  • Thinning hair on scalp (31%)

  • Acanthosis nigricans (30%)

  • Oily skin (29%)

  • Stretch marks (13%)

  • Skin tags (9%)

The primary root cause of most skin issues among women with PCOS is the prevalence of androgens, so reducing the body’s androgen overproduction should be a key focus when addressing PCOS symptoms. 

Stress hormones, chronic inflammation, insulin levels, and thyroid imbalances also disrupt ovulation patterns and periods and may cause skin and hair issues.

Related to these are the four root causes or PCOS subtypes that tend to be distinct in each person. 

These are:

  • Insulin-resistant PCOS: As many as 80% of PCOS cases are attributed to insulin resistance, with the ovaries producing excess androgens due to high levels of insulin in the blood.

  • Post-pill PCOS: A lot of women with PCOS are prescribed birth control. Unfortunately, coming off the pill may create a surge of androgens and make PCOS symptoms flare up for a time.

  • Inflammatory PCOS: PCOS symptoms may also worsen alongside low-grade chronic inflammation due to allergies, gut issues, chronic infections, or intolerances.

  • Adrenal PCOS: As a response to high levels of stress hormones, the adrenal glands may secrete abnormally high levels of DHEA-s, a type of androgen that can also make PCOS symptoms worse.

As you can see, there are varying root causes that may cause PCOS symptoms, including skin issues. 

Some women with PCOS may even find that they have a combination of two or three root causes, so it’s imperative to focus on healing one’s unique root causes to manage PCOS symptoms effectively.

Can PCOS Cause Inner Thigh Darkening?

Yes, but not always. 


Having dark, velvety, and otherwise thicker skin in creases around the thighs is a manifestation of Acanthosis Nigricans, a skin condition closely associated with insulin resistance.


For this reason, it’s common in cases of insulin-resistant PCOS, especially since insulin stimulates skin cells and causes them to overgrow. 


Patients with pre-diabetes or type 2 diabetes may also have this condition, so it’s not exclusive to PCOS—but may occur among those with PCOS and insulin resistance.


Aside from the inner thighs, skin discoloration may also occur around the following body parts:

  • Armpits

  • Neck

  • Elbows

  • Knuckles

  • Vulva

  • Knees

  • Lips

  • Palms

  • Soles of the feet

According to research, high levels of insulin, as well as high androgens, may cause skin patches to occur in women with PCOS. 


The good news is that these skin patches are reversible once the underlying causes have been successfully addressed.

What Else Can Cause Inner Thigh Darkening?

As previously mentioned, skin discoloration in the inner thighs and other body parts is not automatically due to PCOS. 


Other things may also cause it, such as:

1. Chafing Due to Obesity

Because chafing causes repeated trauma on the skin as the thighs rub against each other, dark skin patches may become prevalent in obese individuals with excess skin or skin folds. 

Additionally, wearing tight clothes often or sitting cross-legged for extended periods may contribute to skin darkening in the inner thighs.

2. Fungal Infections

Although not as common in women, fungal infections in the groin areas may also cause darkening of the inner thighs.

Commonly referred to as “jock itch” or tinea cruris, the fungal infection is caused by microscopic, mold-like fungi that can persist in the skin, hair, and nails. 

However, this is more common among men, especially adolescents, and may be accompanied by itchy, burning rashes in the area.

3. Medication

Some medications, like hormonal oral contraceptives, may encourage melanin production and cause darkening of the skin around skin folds, including the inner thighs. 

In such cases, dermatologic procedures, like lightening treatments or topical creams, will often address the issue.

Other PCOS Symptoms to Look Out for

If you’re worried that your darker inner thighs may be a sign of PCOS but have yet to consult a medical professional, it may be helpful to understand how other PCOS symptoms may manifest:

1. Irregular Menstrual Cycles

As discussed earlier, PCOS may cause ovulation issues and lead to longer cycles. 


This often means that you have irregular (not monthly) periods or have longer cycles lasting more than 35 days.

2. Excess Hair Growth (Hirsutism)

The fine hairs on the upper lip, chin, abdomen, breast, lower belly, lower back, and inner thighs are sensitive to hormones. 


For this reason, women with PCOS may find that the usually fine hairs may change into longer, coarser, and darker hairs that grow faster due to high levels of testosterone.

3. Acne and Oily Skin

Women with PCOS may notice that their skin is oilier, and their acne tends to recur in areas like the jaw, chin, and upper neck—areas often associated with hormonal acne. 


PCOS acne lesions may also be deeper, larger, and more difficult to resolve, especially around menstrual periods.

4. Scalp Hair Thinning

The hair follicles in the scalp are also sensitive to hormones, but instead of growing coarser, the hair tends to fall out.


This happens when the follicles die as testosterone is converted into DHT, a more potent form of the male hormone.

5. Fertility Issues

There’s a common misconception that having PCOS automatically means you’re infertile.


This is incorrect.


Some women do have fertility issues due to irregular ovulation patterns and unmanaged PCOS symptoms, though.


However, managing your symptoms and supporting your fertility can definitely raise your chances of falling pregnant, even with PCOS.

6. Weight Management Challenges

Difficulty losing weight is perhaps one of the most frustrating PCOS symptoms, but it’s essential to know that this is usually tied to insulin resistance. 


A lot of us have been told to simply exercise more and lose weight to manage PCOS—as if it’s the easiest thing to do especially with PCOS. 


However, the good news is that once you learn how to manage your insulin resistance through healthy habits and supplementation, losing weight is possible.

How to Manage PCOS-Related Skin Issues and Discoloration

To get a head start on managing PCOS symptoms like darker inner thighs, here are a few key areas of wellness that you can focus on:

1. Diet and Nutrition

You’ll find that good diet and nutrition are crucial when looking to heal your PCOS root cause, and it often starts with learning how to eat the right way. 


What you eat for breakfast, for instance, can change how your blood sugar levels react for the whole day!


This is why typical breakfast foods like cereals and pastries won’t cut it for someone with PCOS. 


You might notice that you find yourself starving or low in energy soon after, and this is because high carbohydrate meals cause our blood sugar to become unstable.


Try employing the “PCOS Repair Breakfast” (it’s part of the PCOS Repair Protocol), which entails having at least 30 grams of protein and non-starchy vegetables (kale, cauliflower, spinach, or zucchini) instead of the usual high-carb breakfast fare. 


Additionally, the PCOS Plate Method is also a great way to get everything you need each time you eat lunch or dinner:

  • ¼ of your plate should be proteins like fish, lean meat, or eggs

  • ¼ should be “gentle starches” like rice, sweet potato, oats, buckwheat, quinoa—carbs that won’t spike your insulin

  • ½ should be non-starchy vegetables like lettuce, broccoli, or other greens

  • Cook with healthy fats like olive oil, nut butter, coconut milk, or avocado (or drizzle them onto your meal

2. Exercise and Weight Management

The best exercise when you have PCOS is the right exercise for your root cause and also something that you enjoy enough to stay consistent with! 


There’s no one-size-fits-all way to move your body, but finding the right exercise plan can improve your insulin resistance, lower stress hormones, and reduce inflammation. 


According to experts, at least 150 minutes of moderate exercise weekly, or 75 minutes of intense exercise per week—is ideal for PCOS weight management.

3. Scientifically Proven Supplements

The right supplements for your PCOS type can also significantly improve your symptoms and help you feel like your best self again. 


Magnesium, for example, has been scientifically proven to reduce inflammation and improve hormone balance, while Omega-3 acts as a natural anti-inflammatory supplement that can improve insulin resistance. 


Inositol can work wonders, too, especially in the correct ratio (40:1) to reduce acne lesions and support insulin resistance.

Nourished Natural Health Supplements

Supplements help critical bodily functions that impact PCOS, like fat metabolism, insulin resistance, and insulin signaling. 


At Nourished Natural Health, our curated range of high-quality supplements is a product of thousands of hours of research—so you can rest assured you’re getting scientifically proven supplements to help support your health. 


We only use the best quality ingredients, with each supplement formulated to help you heal your PCOS symptoms and root causes.

Our Best-Selling PCOS Products for Skin Health

Nourished Natural Health’s PCOS Supplements for Clear Skin & Healthy Hair are your starting points on your way to managing your symptoms and enjoying clear, healthy skin:

  • Androgen Blocker: Now that you understand the importance of managing androgen levels with PCOS, you’ll get why this remains our #1 best-selling supplement and a staple for most Cysters to promote healthy skin and reduce excess hair!

  • Cycle Regulate + Ovulate: 40:1 Myo & D-Chiro Inositol For PCOS: Formulated in a 40:1 ratio similar to naturally occurring Inositol in our bodies, this supplement is critical for skin health and insulin management.

  • Inner Beauty Collagen Powder: Designed to support clear skin and healthy hair, our collagen formulation is made of high-quality marine and bovine collagen.

Free 3 min Quiz 

PCOS? Which Type Do You Have?

About The Author - Tamika Woods

Tamika Woods | PCOS Author | Nourished Natural Health
Tamika Woods, Clinical Nutritionist (B.HS; B.Ed), Bestselling Author

For a decade, Tamika battled chronic acne, irregular cycles, mood swings, hair loss, painful periods, severe digestive issues and Polycystic Ovary Syndrome (PCOS). You name it - she's been there!

Tam was finally able to clear her skin, regulate her cycle, be free of period pain and fall pregnant naturally with her daughter in 2020. It took Tam 10 years and tens of thousands of dollars in tertiary education to get the answers she needed to get better.

She didn’t want other women to suffer as long as she did which is why she has dedicated her life to helping women in the same position as she was.

Tam helps women interpret what their bodies are trying to communicate through frustrating symptoms, and then develop a step-by-step roadmap to find balance again. She's here to help you get on track!

Tamika Woods is the author of the Amazon best seller PCOS Repair Protocol. She holds a Bachelor of Health Science degree (Nutritional Medicine) as well as a Bachelor of Education, graduating with Honours in both.

She is a certified Fertility Awareness Method (FAM) Educator and a certified member of the Australian Natural Therapists Association (ANTA).

Related Products

About The Author - Tamika Woods

Tamika Woods | PCOS Author | Nourished Natural Health
Tamika Woods, Clinical Nutritionist (B.HS; B.Ed), Bestselling Author

For a decade, Tamika battled chronic acne, irregular cycles, mood swings, hair loss, painful periods, severe digestive issues and Polycystic Ovary Syndrome (PCOS). You name it - she's been there!

Tam was finally able to clear her skin, regulate her cycle, be free of period pain and fall pregnant naturally with her daughter in 2020. It took Tam 10 years and tens of thousands of dollars in tertiary education to get the answers she needed to get better.

She didn’t want other women to suffer as long as she did which is why she has dedicated her life to helping women in the same position as she was.

Tam helps women interpret what their bodies are trying to communicate through frustrating symptoms, and then develop a step-by-step roadmap to find balance again. She's here to help you get on track!

Tamika Woods is the author of the Amazon best seller PCOS Repair Protocol. She holds a Bachelor of Health Science degree (Nutritional Medicine) as well as a Bachelor of Education, graduating with Honours in both.

She is a certified Fertility Awareness Method (FAM) Educator and a certified member of the Australian Natural Therapists Association (ANTA).

Related Products