Hirsutism, the growth of coarse, dark hair in areas where women typically have fine or no hair (upper lip, chin, chest, abdomen, back), is treatable through a combination of medications, hair removal methods, and lifestyle changes. Most treatments take at least six months to show visible results because of how slowly hair follicles cycle through growth phases. The most effective approach usually combines a medication that slows new hair growth with a physical removal method that addresses existing hair.
Why Treatment Takes Months to Work
Hair follicles cycle through three phases: active growth, a brief transition, and a resting period where the hair sheds. The active growth phase for facial hair lasts about four months. Because medications only affect follicles during this growth phase, it typically takes six months to notice a change and around nine months to see the full effect. This is why the American Academy of Family Physicians recommends trying any treatment for at least six months before concluding it isn’t working and switching to something else.
Birth Control Pills as First-Line Treatment
Combined oral contraceptives are often the starting point for treating hirsutism, especially when irregular periods or acne are also present. They work in two ways: the estrogen component increases a protein in the blood that binds to testosterone and makes it inactive, while the progestin component reduces the amount of testosterone your ovaries produce. The net effect is lower levels of active androgens circulating in your body.
All combined pills have some anti-androgen activity when you account for the effects of both hormones together, so there’s no strong reason to choose one formulation over another purely for hirsutism. Your doctor will typically pick based on your overall health profile, side effect preferences, and any other symptoms you’re managing. Expect to wait at least six months on the pill before judging its effect on hair growth.
Anti-Androgen Medications
When birth control pills alone aren’t enough, an anti-androgen medication is often added. Spironolactone is the most commonly prescribed option. Originally developed as a blood pressure drug, it blocks androgen receptors in hair follicles and reduces testosterone production. The typical dose is 100 to 200 mg daily, split into two doses. At lower doses, some women notice slowed hair growth and thinner hair shafts within six months, but higher doses tend to produce more noticeable results.
Because spironolactone can raise potassium levels, you’ll need blood work within the first week of starting or adjusting your dose, and periodically after that. You should also avoid potassium supplements and potassium-heavy salt substitutes while taking it. Spironolactone can cause birth defects, so reliable contraception is essential, which is one reason it’s frequently paired with a birth control pill.
Another option is finasteride, which blocks the enzyme that converts testosterone into its more potent form in the skin. It’s used off-label for hirsutism in women and is only partially effective compared to spironolactone. Like spironolactone, it poses serious risks during pregnancy: it can cause abnormal genital development in a male fetus. Strict contraception is non-negotiable for any woman of reproductive age taking either of these medications.
Topical Treatment for Facial Hair
A prescription cream containing eflornithine targets facial hair specifically. It works by blocking a substance inside the hair follicle that’s necessary for hair growth. You apply it twice daily, with at least eight hours between applications. The cream slows hair growth rather than removing it, so most women use it alongside other removal methods like threading or shaving. One important detail: the effect only lasts as long as you keep using the cream. Hair returns to its previous growth pattern once you stop.
Laser Hair Removal and Electrolysis
Physical removal methods are an important complement to medications because drugs slow new growth but don’t eliminate existing hair. The two most effective long-term options are laser hair removal and electrolysis, and they work very differently.
Laser hair removal uses light energy absorbed by the pigment in dark hair to damage the follicle. It can reduce hair in treated areas by up to 80% over a series of sessions. It works best when there’s strong contrast between hair color and skin tone, meaning dark hair on lighter skin responds most reliably. People with gray, red, blonde, or white hair generally aren’t good candidates because the laser can’t effectively target low-pigment follicles. Darker skin tones can be treated with specialized laser technology, but this requires an experienced provider to minimize the risk of skin discoloration.
Electrolysis destroys individual follicles one at a time using an electric current delivered through a tiny probe. It’s the only method the FDA classifies as permanent hair removal, and it works on all skin tones and hair colors. The trade-off is speed: because each follicle is treated individually, electrolysis is best suited for smaller areas like the chin and upper lip. For widespread hirsutism across the chest or abdomen, laser treatment covers more ground per session. Many women with hirsutism use laser first to reduce the bulk of the hair, then electrolysis to pick off remaining or lighter-colored hairs.
The Role of Weight Loss in PCOS-Related Hirsutism
Polycystic ovary syndrome is the most common cause of hirsutism, and excess weight amplifies the hormonal imbalance driving hair growth. Fat tissue contributes to insulin resistance, which in turn signals the ovaries to produce more androgens. For women who are overweight, losing as little as 5% of body weight has been shown to decrease testosterone levels, increase the protein that binds and deactivates testosterone, and reduce hirsutism symptoms.
A low glycemic diet, one that minimizes refined carbohydrates and sugar spikes, appears particularly helpful. Research has shown that 60 days on a low glycemic diet can meaningfully lower the ratio of free androgens in overweight women. This doesn’t replace medication for most people, but it can make medications work better and may be enough on its own for mild cases.
Metformin for PCOS
Metformin, an insulin-sensitizing drug commonly used in PCOS management, is sometimes prescribed with the hope of improving hirsutism. A Cochrane review comparing metformin to birth control pills found that the pill was generally more effective at lowering hirsutism scores, particularly in overweight women. Metformin alone produced hirsutism scores about 1.9 points higher (worse) than the pill in women with a BMI between 25 and 30. Adding metformin to the pill didn’t clearly improve outcomes beyond what the pill achieved alone. Metformin may still have a role in managing other PCOS symptoms like irregular periods and metabolic health, but it’s not a strong standalone treatment for excess hair growth.
Putting a Treatment Plan Together
Hirsutism severity is measured on a standardized scale that grades terminal hair growth across nine body areas: upper lip, chin, chest, upper and lower back, upper and lower abdomen, upper arms, and thighs. Each area is scored from 0 (no excess hair) to 4 (extensive growth), and a total score of 8 or higher confirms clinical hirsutism. Where you fall on this scale helps determine how aggressive your treatment plan should be.
For mild hirsutism, a birth control pill combined with cosmetic removal methods like shaving, waxing, or threading may be sufficient. Moderate to severe cases typically call for adding spironolactone and considering laser hair removal or electrolysis. Facial hair specifically responds well to eflornithine cream layered on top of other treatments. If PCOS is involved, addressing insulin resistance through diet, exercise, and possibly medication lays the groundwork for everything else to work more effectively.
The single most important factor in treating hirsutism is patience. The biology of hair growth means you won’t see the full benefit of any new treatment for six to nine months. Starting a medication and a removal method at the same time gives you the best shot at visible improvement within that window, since the drug slows what’s coming in while the removal method clears what’s already there.