Hair Removal

Female facial hair: think about the cause

Hair on the upper lip and chin responds to androgens, so it grows back after every removal for as long as the hormonal signal persists. Visible hirsutism affects roughly 5 to 10% of women, and 70 to 80% of them have polycystic ovary syndrome, which is why a blood test and, where needed, 6 months of hormonal treatment often achieve more than a tenth laser session. Only two methods last: laser for pigmented hair and electrolysis for blonde, grey or white hair.

Why the upper lip and chin

Not every follicle listens to hormones in the same way. Those on the upper lip, chin, jawline and sideburn area carry androgen receptors, and when androgen activity rises, or the follicle becomes more sensitive to it, fine and almost colourless vellus hair converts into thicker, darker terminal hair. This is why a woman can shave her legs for 20 years without any change and still notice 10 new dark hairs on her chin within a single year.

The trigger differs by age. After the menopause, oestrogen falls while androgen production continues, and most women see more hair on the face from their early 50s onwards. Earlier in life, the usual explanation is polycystic ovary syndrome: the Endocrine Society guideline puts PCOS behind 70 to 80% of hirsutism, often together with irregular cycles, acne or weight gain. Certain medicines add to the list, among them some epilepsy drugs, anabolic steroids and corticosteroids. In 5 to 20% of cases no cause is found at all, and dermatologists call this idiopathic hirsutism.

Hirsutism itself is defined by pattern and thickness, not by a few stray hairs. Clinicians use the modified Ferriman-Gallwey score, which grades 9 body areas from 0 to 4; a total of 8 or more counts as hirsutism in women of European or African ancestry, while the threshold is lower, around 6, for some Asian and South American groups. Roughly 5 to 10% of women in Western countries reach that score, and the proportion is higher in women of Mediterranean or Middle Eastern descent.

When a doctor comes before the salon

Most facial hair is harmless, and if your periods are regular and the growth has crept in slowly over years, guidelines advise against extensive testing. Four situations are different. First, thick dark hair that appears within 1 to 2 years rather than over a decade. Second, hair growth together with periods that come irregularly or not at all. Third, other signs of high androgen levels: thinning scalp hair, persistent acne, a voice that deepens or muscles that grow. Fourth, onset before puberty. The NHS treats sudden new growth combined with a lower voice or bigger muscles as an urgent appointment, because a hormone-producing tumour has to be ruled out, rare as it is.

The examination is usually short: a history, a look at the hair pattern, and a blood sample for total testosterone, ideally in the first days of the cycle if you still have one. If the level is normal but the growth is moderate or severe, free testosterone and a few further hormones follow. Treating a found cause changes the maths of every cosmetic method. A combined contraceptive pill is the first-line option for premenopausal women and needs 6 to 12 months to show an effect on hair, because you only see the change once the existing hairs have finished their cycle. If the result is not enough after 6 months, an antiandrogen such as spironolactone can be added; it takes several more months, and the effect reverses within a year of stopping. Both require reliable contraception, since antiandrogens can harm a male foetus.

For the face alone there is a prescription cream with eflornithine that slows growth in the follicle rather than removing hair. Applied twice a day, it shows an effect after 4 to 8 weeks at the earliest and works only as long as you keep using it; roughly 1 in 3 users sees a marked improvement after 24 weeks, and stinging or acne-like spots are the common side effects. Guidelines suggest it as a companion to laser, because the two together bring a faster visible result than either alone.

Which method suits the face

Shaving remains the simplest option and the most misunderstood. The blade cuts the hair shaft at skin level; the follicle underneath does not learn anything from that, so the regrowth is neither thicker nor darker, it merely has a blunt tip that feels coarser. On the upper lip, stubble is visible again after 1 to 3 days. Threading and tweezing pull the hair out with its root and keep the area clear for 2 to 4 weeks, with a precision that suits the lip line and brows. Sugaring and film wax do the same for larger patches and last 3 to 4 weeks; both are milder on the thin skin of the upper lip than classic warm wax, and the hair needs about 3 to 5 millimetres of length to be gripped.

Two methods can end the cycle. Laser and intense pulsed light heat the pigment in the hair shaft and damage the follicle, so they need dark hair: the Endocrine Society suggests photoepilation for auburn, brown or black hair and electrolysis for blonde, grey or white hair, which lasers cannot see. Expect a 10 to 25% reduction after the first session. Body areas often get by with 2 to 6 sessions, but the face, driven by hormones, commonly takes 6 to 10, spaced 4 to 6 weeks apart because the growth cycle there is short. Darker skin types need a long-wavelength device, typically a 1064 nanometre Nd:YAG laser with skin cooling, to spare the pigment in the skin. One warning belongs in every consultation: women of Mediterranean or Middle Eastern descent with fine facial hair carry a higher risk of paradoxical hypertrichosis, where light treatment stimulates rather than destroys the follicle, particularly along the jaw and cheek.

Electrolysis passes a fine probe into each follicle and destroys it with current or heat, one hair at a time, which makes it slow (a 15-minute session treats roughly 30 to 60 hairs) but colour-blind and, unlike laser, recognised as permanent. Because a current runs through the skin, electrolysis is not an option with a pacemaker or another implanted cardiac device; laser, eflornithine and the hormonal route above are the safer choices there. Sessions every 1 to 2 weeks over 12 to 18 months are a realistic course for an upper lip. Whichever route you choose, insist on a trained operator with disposable needles or a registered laser practice; the redness and swelling of a proper treatment settle in 1 to 3 days, while burns and pigment changes come from the wrong settings on the wrong skin.

What you can skip and what to do afterwards

Bleaching creams lighten dark hair, but blond fuzz on tanned or olive skin can stand out more than the dark hair did, and the peroxide irritates the same thin skin you are trying to protect. Depilatory creams dissolve hair chemically; on the face they are among the most frequent causes of contact irritation, and a patch test 48 hours ahead is the minimum. Home light devices work on the same principle as a clinic laser at far lower energy, typically 3 to 7 joules per square centimetre against 15 to 40 in a clinic, which makes them slower and less reliable on hormonally driven hair.

After any removal on the face, the skin is inflamed for a day or two, and inflamed skin pigments faster under UV. That, not the hair, is the usual origin of a brownish shadow above the lip after a summer. A broad-spectrum SPF 30 to 50 every morning for at least 2 weeks after waxing, threading or a laser session, and no sunbathing or sunbeds for 4 weeks around a laser appointment, are the two habits that prevent it. If you take isotretinoin for acne, tell the practitioner: many clinics still wait 6 months after the last tablet before waxing or laser.

The order of decisions matters more than the choice of device. Look for a cause first if the growth is new or comes with other signs, give hormonal treatment its 6 to 9 months, and use shaving or threading in the meantime; then, once the driver is calmer, book a laser or electrolysis series that has a chance of holding. Our guide on hair removal methods compares the options for the rest of the body, and the Sun Exposure Timer helps with the sunscreen part.

Before you book a laser series

Frequently asked

Does shaving make facial hair grow back thicker?

No. A razor cuts the shaft above the follicle and changes nothing below the skin; the regrowth feels coarser only because the cut end is blunt instead of tapered, and stubble on the lip shows after 1 to 3 days.

Why does the hair keep coming back on my chin?

Because the follicles there respond to androgens, and as long as the hormonal signal continues they keep converting fine hair into dark terminal hair. Removing the hair does nothing to the signal; treating a cause such as PCOS or the hormonal shift after the menopause does, but it takes 6 to 12 months to show.

When should I see a doctor rather than a beautician?

If thick dark hair has appeared within 1 to 2 years, if your periods are irregular, or if you notice thinning scalp hair, persistent acne, a deeper voice or growing muscles. Sudden growth together with a lower voice needs an urgent appointment, and a total testosterone blood test is usually the first step.

How many laser sessions does the upper lip need?

Usually 6 to 10, spaced 4 to 6 weeks apart, with a 10 to 25% reduction after the first. The hair has to be dark, and hormonally driven hair often needs a maintenance session 1 to 2 times a year.

Does bleaching help?

Only partly. Bleach lightens dark hair without removing it, and on tanned or olive skin the blond fuzz can be more visible than the dark hair was; the peroxide also irritates the thin skin above the lip.

Is electrolysis worth it for grey hairs on the chin?

Yes, it is the only permanent option for grey, white or blonde hair, because lasers need pigment. Count on sessions of 15 to 20 minutes every 1 to 2 weeks over 12 to 18 months for a chin.

Sources

• NHS: Hirsutism · causes, medicines, when to see a GP, urgent signs such as a deeper voice
• British Association of Dermatologists: Hirsutism, patient information leaflet · prevalence 5 to 10%, no cause found in 5 to 20%, shaving myth, eflornithine 4 to 8 weeks, pill 6 to 12 months
• Martin KA et al.: Evaluation and Treatment of Hirsutism in Premenopausal Women, Endocrine Society Clinical Practice Guideline, J Clin Endocrinol Metab 2018 · PCOS in 70 to 80%, Ferriman-Gallwey thresholds, 6-month trial before changes, photoepilation by hair colour, paradoxical hypertrichosis; the publisher answers 403 to curl, page verified in a browser-like fetch
• American Academy of Dermatology: Laser hair removal, FAQs · 2 to 6 sessions, 4 to 6 week intervals, 10 to 25% reduction after the first, side effects settle in 1 to 3 days

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This guide is for general information. It does not replace medical or professional cosmetic advice or an examination.