Is unwanted facial hair in women a hormone question?
Often it is, and it is worth asking before any hair is removed. Doctors call thick, dark, male-pattern hair growth in women hirsutism. It can appear on the upper lip, chin, jaw, chest, lower abdomen or back. For many women the cause is hormonal, and the most common hormonal cause is polycystic ovary syndrome (PCOS). For others no cause is found and it runs in the family.
Laser sits at the end of this question, not the start. The rest of this article follows the order a doctor would.
Fine hair, or hirsutism?
Everyone has some facial hair. Fine, pale peach fuzz is normal. Hirsutism means terminal hair, the thick, dark, coarse kind, growing where it would usually be seen in men. The difference matters because only the second kind raises a hormone question.
Doctors score it with the Ferriman-Gallwey method. In plain words, nine areas of the body are each given a mark from 0 to 4 for how much terminal hair is there, and the marks are added up. DermNet NZ gives a total below 8 as normal, 8 to 14 as mild, and 15 or more as moderate to severe. It is a scoring tool for a clinician, not a self-test. Cut-offs can vary between ethnic groups, so the doctor interprets the number in context.
What causes it?
The hair follicle responds to androgens, sometimes called male hormones, which every woman makes in small amounts. Hirsutism happens when there is more androgen, or when the follicles respond more strongly to the usual amount. DermNet NZ and the NHS list the main causes:
PCOS is the most common hormonal cause, and it often comes with irregular periods and insulin resistance. Some women have no cause found, and the pattern is genetic. Less often the cause is Cushing syndrome, congenital adrenal hyperplasia, or a tumour of the adrenal gland or ovary. Some medicines can also do it. The NHS names epilepsy medicines and steroids, and DermNet lists androgen-type medicines. Never stop a prescribed medicine without asking the prescriber.
The 2023 international PCOS guideline is a reminder of why this matters beyond hair. It describes PCOS as having broader features, including metabolic risk factors, cardiovascular disease, sleep apnoea and a very high prevalence of psychological features. So the hair can be the visible tip of something that deserves a proper look.
Which signs need a prompt medical review?
Three patterns are worth acting on soon rather than waiting.
The first is sudden onset. The NHS advises an urgent GP appointment when new thick, dark hair starts growing quickly on the face and body. DermNet NZ also says rapid onset warrants investigation. The second is virilisation, which DermNet describes as a deepening voice, balding, acne, a smaller breast size, clitoral enlargement or increasing muscle bulk. The third is hair together with irregular or missing periods, which points toward a hormone condition. The first two can reflect a serious cause such as a tumour, so they are a reason to see a doctor promptly. None of these can be assessed from a photograph or an article.
What does the hormone work-up involve?
It belongs to a GP, gynaecologist or endocrinologist. The Endocrine Society guideline suggests testing for raised androgen levels in women with an abnormal hirsutism score, and against routine testing in women with regular periods and only a small patch of unwanted hair. DermNet NZ describes blood tests of hormone levels, cortisol and thyroid function where the score is high, and a pelvic ultrasound for polycystic ovaries. The 2023 PCOS guideline notes that anti-Mullerian hormone can replace ultrasound as a diagnostic test in adults only.
What the tests show decides the next step. A skin specialist or aesthetic doctor can examine the skin and refer, but the hormone work-up is not a cosmetic job. The same logic applies to hormonal acne, which often arrives with the same hormone pattern.
How is it treated medically?
The Endocrine Society guideline abstract is clear on the order. For most women troubled by hirsutism despite shaving, plucking or waxing, it suggests starting with medicine and adding direct hair removal (electrolysis or photoepilation) for those who want more cosmetic benefit. For mild hirsutism with no sign of a hormone disorder, either route is reasonable.
The medicine it suggests for most women is the combined oral contraceptive pill, adding an anti-androgen medicine after 6 months if the response is poor. It advises against an anti-androgen on its own unless reliable contraception is used, because these medicines can harm a developing baby. It suggests against insulin-lowering drugs for hirsutism. The NHS also lists a prescription cream, eflornithine, to slow facial hair growth. All of this is prescribed, and none of it is a do-it-yourself job. DermNet adds a point that surprises people: hair regrows if medical treatment stops.
Where does laser hair removal fit?
Alongside, not instead. Of the women who choose hair removal, the Endocrine Society suggests laser or photoepilation for most, and DermNet lists laser and electrolysis among the options. Laser reduces hair in the area treated and is a cosmetic help while the underlying cause is looked after. It does not treat PCOS or any other cause.
This clinic does not offer laser hair removal. For who may lawfully perform it in Malaysia, and what to expect on darker skin, read laser hair removal in Malaysia before booking anywhere. It is worth asking the person doing it whether any hormone check has been done.
The honest complication
A woman can wax, thread and try several lasers and still see the hair return. When a hormone is driving it, new hair keeps being made, and a treatment that removes the visible hair cannot switch that off. That is not a failure of the laser. It is the wrong question being asked of it.
A woman with a few chin hairs, regular periods and no other symptoms may need no tests at all, as the guideline itself suggests. The skill is telling that woman from the one who does.
