Guide · PCOS and unwanted hair
PCOS hair removal: hirsutism, a medical check first, and why laser needs more sessions
Excess hair with polycystic ovary syndrome is driven by hormones, so removing it is more effective alongside treatment of the cause. Here is how hirsutism is assessed, how laser fits with care from your GP, gynaecologist or endocrinologist, and what a realistic course looks like.
Written & medically reviewed by Dr Sin Yong · 9 October 2026
Quick answer
- PCOS hair removal is more effective as a combined plan. Hirsutism, coarse dark hair in a male-type pattern such as the chin, upper lip, chest or abdomen, is a sign of raised androgens, and the hormonal side should be assessed by a doctor before or alongside laser.
- A medical work-up comes first: a hirsutism score, blood tests for androgens, and checks that exclude other causes such as thyroid disease, high prolactin or adrenal conditions. Hair that appears suddenly or worsens quickly needs prompt review.
- Laser reduces hair and, in a randomised trial in women with PCOS, also eased depression and anxiety. The 2023 international PCOS guideline notes that more sessions may be needed than for other women, and that adding the combined pill may improve reduction and maintenance.
- At SkinRev Lab, Dr Sin Yong performs laser hair removal on the Lutronic Clarity II (755 nm and 1064 nm), works alongside your own doctors on the hormonal side, and prices treatment at consultation.
Hirsutism
What hirsutism is, and how it links to PCOS
Hirsutism means coarse, dark hair growing in a male-type pattern in women: on the upper lip, chin, jawline, neck, chest, abdomen or back. It is the main visible sign of hyperandrogenism, the effect of androgens such as testosterone on the skin and hair follicles.
Polycystic ovary syndrome (PCOS) is the commonest hormonal condition in women of reproductive age. The 2023 international PCOS guideline puts its prevalence at 10% to 13% worldwide, possibly higher in the South East Asian region, and states that hirsutism on its own should be considered predictive of raised androgens and PCOS in adults.
Doctors grade hirsutism with the modified Ferriman–Gallwey (mFG) score, which rates hair growth across several body areas against a picture scale. The guideline recommends a cut-off of 4 to 6 depending on ethnicity, and notes that severity may vary between ethnic groups while prevalence appears similar. Because many women already shave, pluck or thread, the score can understate the real amount of hair, so say what you do at home.
Diagnosis
Medical work-up first: why the cause matters
PCOS is diagnosed when two of three features are present, after other causes have been excluded: clinical or biochemical hyperandrogenism, such as hirsutism or raised androgen levels; ovulatory dysfunction, usually irregular periods; and polycystic ovaries on ultrasound or, in adults, a raised anti-Müllerian hormone (AMH) level. When irregular periods and hyperandrogenism are both present, ultrasound or AMH is not needed.
The Endocrine Society suggests testing androgen levels in all women with an abnormal hirsutism score. Depending on the picture, doctors also check for thyroid disease, high prolactin, congenital adrenal hyperplasia, Cushing's syndrome and, rarely, an androgen-secreting tumour of the ovary or adrenal gland. The timing of onset and how fast symptoms progress are central to spotting a tumour, so sudden or rapidly worsening hair growth needs prompt review.
If you already take the combined pill, tell your doctor: it changes hormone results, and the guideline notes it may need to be stopped for at least three months if accurate androgen testing is essential.
- Hair growth that started suddenly or is getting worse quickly
- Missed periods or cycles shorter than 21 or longer than 35 days
- Acne or thinning scalp hair alongside the new hair
- Hair growth that began after stopping or starting a medicine
Combined approach
PCOS hair removal: the combined approach
Hair removal treats the hair that is already there; medicine reduces the hormonal drive behind it. The Endocrine Society guideline suggests that for women whose hirsutism still bothers them despite shaving, plucking or waxing, treatment usually starts with medication, adding direct hair removal such as laser or electrolysis for further cosmetic benefit. For mild hirsutism with no endocrine disorder, either approach alone is reasonable, and for women who choose hair removal it suggests laser or photoepilation.
Medication is prescribed by your GP, gynaecologist or endocrinologist after assessment. The guidelines describe the combined oral contraceptive pill as the usual first choice for hirsutism, particularly with irregular periods, with an anti-androgen added after about six months if the response is not enough, and only with reliable contraception. These are prescription medicines with their own risks, discussed with the doctor who prescribes them.
The 2023 PCOS guideline adds that combining the pill, with or without an anti-androgen, with laser may give greater hair reduction and better maintenance than laser alone. It also keeps healthy lifestyle and emotional wellbeing at the centre of PCOS care.
Evidence
What laser does for PCOS-related hair
In a randomised controlled trial of 88 women with facial hirsutism due to PCOS, five high-energy laser treatments over six months were compared with five low-energy treatments. Self-rated facial hair severity fell from 7.3 to 3.6 out of 10 with high energy, against 7.1 to 6.1 with low energy, and time spent on hair removal fell from 112 to 21 minutes a week. Depression and anxiety scores also fell more in the high-energy group.
The 2023 international guideline recommends that laser and light therapies be considered for reducing facial hirsutism and the related depression, anxiety and reduced quality of life in women with PCOS. It notes that adverse effects appear limited when treatment is given by experienced, suitably qualified providers.
Laser does not change the hormones themselves. It reduces the hair those hormones produce, which is why it works as part of the plan rather than instead of it.
Sessions
Why more sessions and maintenance are typical
The guideline states that a greater number of laser sessions may be needed in women with PCOS than in women with hirsutism from other causes. In a prospective study of 60 women with PCOS treated with an alexandrite laser, hair counts fell by an average of 31% after six treatments, less than expected. The hair-free interval lengthened from 1.9 weeks after six treatments to 4.3 weeks after ten, and after an average of 12 treatments, 31% had gaps longer than six weeks.
The reason is the ongoing hormonal drive: androgen-sensitive areas such as the chin and jawline can keep producing new hair over time even as treated follicles are reduced. That is not a failure of earlier treatment, and it is why maintenance is discussed honestly at the start.
In practice, expect a longer first course than a woman without PCOS treating the same area, sessions timed to the hair cycle, and maintenance visits afterwards. Hormonal treatment from your doctor can help lengthen the gaps.
Face and fine hair
Chin, upper lip and fine hair
The chin, jawline and upper lip are the areas that trouble many women with PCOS. Coarse, dark chin hair responds well to laser; fine, light down responds poorly, and the 2023 guideline notes that laser is relatively ineffective for blond, grey or white hair. It also notes that low- and high-energy lasers appear similarly effective on facial hair, with less pain at low energy.
Treating the face and neck carries a small risk of paradoxical hypertrichosis, new fine hair stimulated near the treated area. A meta-analysis put it at about 3% overall, mainly on the face and neck, and it often improved with continued treatment.
Some doctors add eflornithine, a prescription cream that slows facial hair growth. In a randomised trial of upper-lip laser in women, sides also treated with eflornithine reached complete or almost complete hair removal in 93.5% of cases against 67.9% with laser alone over six months. Like other prescription medicines, it is given by a doctor after assessment.
Skin tone
Choosing the wavelength for Asian skin
The 2023 guideline notes that the wavelength and delivery of laser vary with skin and hair colour. On the Lutronic Clarity II, Dr Sin Yong uses 755 nm alexandrite where dark hair sits on lighter skin, and 1064 nm Nd:YAG on brown or tanned skin and in naturally darker areas, chosen area by area.
Darker skin carries a higher risk of pigment change with shorter wavelengths: a review found pigment change in up to 19% of people treated with shorter-wavelength lasers, particularly in darker skin, against 2–3% with Nd:YAG. Avoiding tans and using sunscreen throughout the course matter for every skin tone, and a test patch is sensible if your skin is darker or sensitive.
Meanwhile
Other hair removal methods, before and between sessions
Shaving and trimming are fine before and during a laser course, because they leave the root in place. Waxing, plucking, threading and epilators remove the hair the laser needs, so stop them about four weeks before your first session and avoid them between sessions.
Electrolysis destroys follicles one at a time and works on any hair colour, which makes it useful for light or grey hairs that laser cannot target; it is slow for larger areas and is not offered at SkinRev. The PCOS guideline says IPL could be considered, though its benefits may be smaller than laser's, and found no evidence to support home IPL kits.
Waxing at SkinRev Lab suits anyone not planning laser, or whose hair is too light for it.
Wellbeing
Wellbeing, and when to see another specialist
Unwanted hair can affect mood, confidence and daily routine, and the guideline asks health professionals to treat reports of excess hair as important regardless of how severe it looks. In the randomised laser trial above, depression and anxiety scores fell with effective treatment. If low mood or anxiety persists, speak to your GP.
PCOS is more than hair. The guideline highlights metabolic effects, cardiovascular risk, sleep apnoea and risks in pregnancy, so regular review with a GP, gynaecologist or endocrinologist matters whether or not you have laser. If you are pregnant, laser is usually deferred, and if you are trying to conceive, a gynaecologist or fertility specialist leads care. A dermatologist can help with acne or thinning scalp hair.
At SkinRev Lab
PCOS hair removal at SkinRev Lab
Laser hair removal is performed by Dr Sin Yong. At consultation he asks about your periods, acne, scalp hair, weight changes, medicines and any tests or diagnosis you already have, examines the areas that bother you, and assesses skin type and hair colour. If the cause has not been checked, or anything suggests a cause other than PCOS, he will advise seeing your GP, gynaecologist or endocrinologist first or alongside laser.
He explains realistic expectations: a longer course than usual, maintenance afterwards, and a better chance of lasting reduction when hormonal treatment is also in place. Options discussed include laser, shaving, waxing, electrolysis elsewhere, and no treatment. Treatment is priced at consultation, and results vary between people.
Laser hair removal is available at SkinRev Lab, #B1-28 CityLink Mall, 1 Raffles Link, by City Hall and Esplanade MRT (daily 11am–8pm, WhatsApp +65 8266 9585), and at IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, beside Orchard MRT (WhatsApp SkinRev Lab on +65 8266 9585 or IN Eternity Clinic on +65 8815 3008).
Sources
References & sources
- Teede HJ, Tay CT, Laven JJE, et al. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. J Clin Endocrinol Metab. 2023;108(10):2447-2469.
- Martin KA, Anderson RR, Chang RJ, et al. Evaluation and Treatment of Hirsutism in Premenopausal Women: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab. 2018;103(4):1233-1257.
- Clayton WJ, Lipton M, Elford J, Rustin M, Sherr L. A randomized controlled trial of laser treatment among hirsute women with polycystic ovary syndrome. Br J Dermatol. 2005;152(5):986-992.
- McGill DJ, Hutchison C, McKenzie E, McSherry E, Mackay IR. Laser hair removal in women with polycystic ovary syndrome. J Plast Reconstr Aesthet Surg. 2007;60(4):426-431.
- Hamzavi I, Tan E, Shapiro J, Lui H. A randomized bilateral vehicle-controlled study of eflornithine cream combined with laser treatment versus laser treatment alone for facial hirsutism in women. J Am Acad Dermatol. 2007;57(1):54-59.
- Snast I, Kaftory R, Lapidoth M, Levi A. Paradoxical hypertrichosis associated with laser and light therapy for hair removal: a systematic review and meta-analysis. Am J Clin Dermatol. 2021;22(5):615-624.
- Lim SP, Lanigan SW. A review of the adverse effects of laser hair removal. Lasers Med Sci. 2006;21(3):121-125.
Common questions
Your questions,
answered
Does laser hair removal work for PCOS?
Yes, it reduces hair for many women with PCOS, and in a randomised trial it also eased depression and anxiety. Expect more sessions than usual and maintenance afterwards, because the hormonal drive continues. Results vary.
Why does my PCOS hair keep coming back after laser?
Androgens can keep producing new hair in sensitive areas such as the chin and jaw even as treated follicles are reduced. Maintenance sessions, and hormonal treatment from your doctor, help keep regrowth manageable.
How many laser sessions will I need with PCOS?
More than a woman without PCOS treating the same area. In one study, gaps between needing hair removal lengthened noticeably between six and ten or more treatments. Your plan is set at consultation and reviewed as you go.
Should I see a doctor before PCOS hair removal?
Yes, especially if you have not been diagnosed, your periods are irregular, or the hair appeared suddenly or is worsening quickly. Blood tests and an examination exclude other causes and guide hormonal treatment.
Can I have laser while on the pill or an anti-androgen?
Generally yes, and the 2023 guideline notes that combining these medicines with laser may improve hair reduction and maintenance. Tell the laser doctor about every medicine you take, as some make skin more sensitive to light.
Electrolysis or laser for PCOS hair?
Laser treats many dark hairs at once and suits larger areas; the Endocrine Society suggests laser or photoepilation for most women who choose hair removal. Electrolysis treats one follicle at a time and is the option for light or grey hairs. SkinRev does not offer electrolysis.
Can laser treat PCOS hair on the chin and neck?
Yes, coarse dark chin and neck hair usually responds. Fine, light hair responds poorly, and there is a small risk, about 3% in a meta-analysis and mainly on the face and neck, of new fine hair being stimulated.
Is laser hair removal safe for PCOS on darker skin?
It can be, with the right wavelength. 1064 nm Nd:YAG is usually preferred for brown or tanned skin because skin pigment absorbs less of it. A test patch and strict tan avoidance lower the risk of pigment change.
Can I have laser hair removal while pregnant or trying to conceive?
Laser is usually deferred during pregnancy, as hair growth often changes afterwards. If you are trying to conceive, discuss timing with your gynaecologist or fertility specialist and the laser doctor.