What Causes Facial Hair Growth in Women?

Do you dream of waking up with a flawless complexion, free from your daily ritual of shaving or tweezing? For many women, this dream becomes a distant memory as they face the reality of unwanted facial hair. While a bit of barely-there “peach fuzz” is a normal part of life, sometimes these wispy hairs transform into something much coarser and darker. This unexpected growth can be frustrating and confusing, leaving you wondering – what’s causing this, and how can I get rid of it? 

The answer, like many things in women’s health, can be traced back to hormones. But that’s not the whole story! Dive deeper with us to explore the reasons behind unwanted facial hair and discover long-lasting solutions to achieve the smooth, hair-free skin you deserve.

Hormonal Imbalance: The Most Common Culprit

The most common cause of excess facial and body hair in women (and anyone AFAB) is a hormonal imbalance. Our bodies are complex hormonal ecosystems, and when the balance tips towards androgens (often referred to as “male hormones”), it can lead to excess hair growth. A hormone imbalance is typically diagnosed via a blood test.

Let’s explore the hormonal conditions that can trigger excess hair growth in women:

Polycystic Ovary Syndrome (PCOS)

This endocrine disorder disrupts ovulation, the process by which an egg is released for potential fertilization. The exact cause of PCOS remains under investigation, but genetics, insulin resistance and environmental factors are likely culprits. 

Women with PCOS often have multiple small cysts in their ovaries. These cysts can disrupt the production of estrogen and progesterone, the two main female sex hormones. As a result, the body may overproduce androgens, leading to symptoms like an irregular menstrual cycle, weight gain and unwanted facial hair growth.

Congenital Adrenal Hyperplasia (CAH)

This genetic condition specifically affects the adrenal glands, two pea-sized glands situated on top of the kidneys. The adrenal glands produce various hormones, including cortisol, which helps regulate stress and blood sugar, and androgens. In CAH, the body struggles to produce cortisol due to a missing or malfunctioning enzyme. To compensate, the body ramps up androgen production, leading to symptoms like early puberty, rapid weight gain and – you guessed it – unwanted facial hair growth in females.

Cushing Syndrome

This medical condition arises when the body is exposed to high levels of the hormone cortisol for a prolonged period–usually due to a tumor on the adrenal glands or taking high doses of corticosteroid medications. Excess cortisol disrupts the normal production of other hormones. Similar to PCOS and CAH, this imbalance can lead to increased levels of androgens and, consequently, unwanted facial hair growth in women.


As women transition into menopause, our bodies naturally produce less estrogen. This decline in estrogen can cause a relative increase in androgen levels, even though the actual androgen production may not change significantly. This hormonal shift can contribute to some new hair growth on the face, along with other well-known menopausal symptoms like hot flashes and vaginal dryness.


Certain medications can have surprising side effects, including unwanted hair growth. Oral contraceptives, particularly birth control pills with high levels of androgenic progestins, can contribute to this. Minoxidil, applied topically to the scalp to treat hair loss, can cause excess hair growth elsewhere on the body. Anabolic steroids, sometimes misused to enhance muscle mass, are notorious for causing excess hair growth throughout the body, including the face.

Other Causes

A few other factors can contribute to unwanted facial hair:

  • Genetics: If you have a family history of excess hair growth, you may be more likely to experience it yourself.
  • Ethnicity: Women of Mediterranean, Middle Eastern and South Asian descent are more likely to have coarser body and facial hair.
  • Obesity: Fat tissue can convert androgens into usable forms, potentially increasing hair growth.

Hirsutism vs. Hypertrichosis: What’s the Difference?

Hirsutism and hypertrichosis are terms both used to describe unwanted hair growth, but they have distinct causes and characteristics. 

Hirsutism: This term specifically refers to the growth of terminal hair (coarse, dark hair) in areas where men typically grow hair, such as the upper lip, chin, beard and around the nipples. The most common cause of hirsutism is a hormonal imbalance, but idiopathic hirsutism, which has no known cause, can occur as well.

Hypertrichosis is a broader term encompassing any abnormal excess body hair, regardless of location or hair type (including both terminal and vellus – fine, downy hair). Unlike hirsutism, which is primarily a concern for women, hypertrichosis can affect people of all genders and ethnicities.

Here’s a quick breakdown to solidify the key differences:

Hair TypeTerminal (coarse, dark)Terminal or vellus (fine, downy)
LocationMale pattern areas (upper lip, chin, etc.)Any area of the body
Sex PrevalenceMore common in womenAffects people of all genders
Underlying CauseHormonal imbalances (often PCOS, Cushing syndrome)Genetic, medications, hormonal imbalances, medical conditions

Treatment Options for Unwanted Facial Hair

If you’re bothered by unwanted facial hair, there are several treatment options available. Here’s a breakdown of some common methods to achieve smoother skin:


This is the quickest and easiest method, using a razor to cut hair at the skin’s surface. While convenient, shaving provides only temporary results, with hair regrowth typically noticeable within a day or two. This method can also lead to stubble and irritation for some.

Depilatory Creams

These over-the-counter creams contain chemicals that dissolve the hair shaft at the skin’s surface. They are painless and easy to use, but results are temporary, similar to shaving, and may only last a few days. Depilatory creams can also irritate the skin, so a patch test is recommended before applying to the face.

Waxing and Sugaring

These techniques involve applying a warm wax or sugar paste to the skin, adhering to the hair. Once the wax or sugar hardens, it’s then pulled off, removing the hair from the root. Waxing and sugaring offer longer-lasting results than shaving, typically lasting 2-4 weeks. However, they can be painful, especially on sensitive areas like the face. 


This method doesn’t remove hair, but lightens its color, making it less noticeable. Bleaching creams or solutions are applied to the face, lightening the pigment in the hair shaft. The results are temporary and require frequent reapplication (every few weeks) as new hair grows. Bleaching can irritate the skin, so a patch test is recommended.

Eflornithine Cream

This prescription cream offers a topical approach to managing unwanted facial hair growth in women. Eflornithine works by inhibiting an enzyme crucial for hair growth within the follicle. While it doesn’t remove hair, it can slow down its growth rate and reduce coarseness over time. Applied twice daily, Eflornithine typically takes 4–8 weeks to show noticeable results and requires ongoing use to maintain its effects.

Anti-Androgen Medications

For women with underlying hormonal imbalances causing excess hair growth, such as PCOS, medications can help regulate hormone levels and reduce facial hair. Spironolactone is a common anti-androgen medication that can take several months to show noticeable results and may need to be taken continuously.


This is a more permanent, in-office hair removal method that uses a thin probe inserted into the hair follicle. A tiny electric current is then delivered to destroy the follicle’s growth center. Electrolysis is a time-consuming process, requiring multiple sessions (often spaced weeks apart) to treat each hair follicle individually. It’s most effective on coarse hair and may be less effective on fine or light-colored hair. 

Laser Hair Removal

This method offers a more permanent solution by targeting the hair follicle with concentrated laser light. The laser damages the follicle’s growth center, reducing future hair growth. Laser hair removal requires multiple sessions (typically 6-8) spaced several weeks apart to target hairs in different growth stages. While not entirely permanent, laser hair removal can significantly reduce hair growth and provide long-lasting results. 

When to See a Doctor

While a little facial hair is usually no cause for concern, it’s important to see a medical professional if you experience sudden or severe hair growth, especially if it occurs alongside:

  • Hair growth in a male pattern (around the chin and beard)
  • Rapid weight gain
  • Irregular periods
  • Acne

Your doctor can help diagnose the underlying cause of your facial hair growth and recommend the most appropriate treatment options.

Taking Control of Unwanted Hair

Don’t let unwanted facial hair hold you back! Radiant Laser MD in Cambridge, MA offers safe and effective laser hair removal solutions tailored to your specific needs. We understand that unwanted hair can be a source of self-consciousness, and we’re here to both help you achieve smooth skin and boost your confidence. Schedule a consultation today to discuss your options and find the perfect solution for you!Disclaimer: This blog post is for informational purposes only and should not be considered medical advice. Please consult with a professional to discuss your individual situation.

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