Laser hair removal works for hirsutism: dark, coarse hair that grows because of hormones is just as visible to the laser as any other. The difference is that the course is longer and maintenance visits come more often, because the cause of the growth stays inside the body and the laser does not treat it. The Endocrine Society guideline on hirsutism recommends light-based hair removal, laser or IPL, for dark hair and electrolysis for light and grey hair. How hirsutism differs from a few hairs on the chin, how many sessions PCOS takes, what the increased growth on the face is about, and which doctor to see alongside the course - we cover all of it in this article.
Hirsutism or just a few hairs on the chin
Most women have a few dark hairs above the lip or on the chin, and that is not a diagnosis. Doctors call it hirsutism when coarse dark hair grows in a male pattern: chin and cheeks, neck, chest, the midline of the belly, lower back, inner thighs. It often comes together with irregular periods and acne, and then there is a hormonal cause worth finding.
For the laser the difference is in the plan. A few stubborn hairs on the chin go away over a standard course. Male-pattern hair with a hormonal cause needs a longer course and maintenance, and it is better to know that before the first session. Chin hair specifically, when a few hairs are normal and when to see a doctor: chin hair in women.
Sources: NHS (UK), Hirsutism, Endocrine Society, Hirsutism guideline 2018
Where facial hair in women comes from
Coarse hair growth is triggered by androgens, the male hormones that the female body has as well. Hair appears when their level rises or when the follicles become more sensitive to them at a normal level. The most common cause is polycystic ovary syndrome (PCOS), where excess hair growth is one of the main symptoms alongside irregular periods and acne. Sometimes no clear cause is found. More rarely medications are to blame, for example some epilepsy drugs and steroids, or other hormonal conditions that a doctor identifies.
If hair on the face and body appeared fast, within a few months, and your voice got deeper along with it, see a doctor without delay, regardless of hair removal.
Sources: NHS (UK), Hirsutism, NHS, PMOS (formerly PCOS, polycystic ovary syndrome)
What the laser can and cannot do with a hormonal cause
The laser heats the pigment in the root of the hair and destroys the follicle. It does not affect hormones and does not reach the blood or organs. So laser hair removal for PCOS does exactly one thing: it removes the hair that has already grown and stops it regrowing from destroyed follicles. How the light acts on the hair is covered in detail in the article which laser is best for hair removal.
Laser for PCOS has been tested in clinical studies. In a British study from 2005, 88 women with facial hair due to PCOS were split into two groups and had 5 sessions over six months. In the 51 women treated at full power, the severity of the hair by their own rating fell from 7.3 to 3.6 out of 10, and time spent removing hair fell from 112 to 21 minutes a week; with weak flashes it fell only from 7.1 to 6.1. A 2024 review in JAMA Dermatology gathered 6 studies of 423 women with PCOS: the alexandrite laser clearly reduced the severity of hirsutism, and the diode laser combined with medical treatment gave more than the laser on its own. The review's authors themselves rate the certainty of the evidence as low.
The cause stays, though. While androgen levels are high, the body keeps waking dormant follicles and turning fine fuzz into coarse hair. That is why new hairs appear even after a good course. The laser removed what was there, and the new hair grew from follicles that were still asleep during the course.
Sources: Br J Dermatol 2005 (PubMed), JAMA Dermatol 2024 (PubMed)
How many sessions for PCOS and how often to maintain
A standard course is 6-10 sessions plus one or two maintenance sessions a year, covered in the article how many laser hair removal sessions you need. With a hormonal cause, in our experience the course is longer: from 12 sessions on the face, from 10 on the body. Maintenance after the course is needed more often than the usual one or two visits a year, 3-4 times a year. The body responds better than the face with hirsutism: the hair there is denser and the hormonal stimulation weaker.
| Area | Standard course | With a hormonal cause | Maintenance |
|---|---|---|---|
| Chin, upper lip, cheeks | 6-10 | from 12 | 3-4 times a year |
| Neck | 6-10 | from 10 | 3-4 times a year |
| Belly, lower back | 6-10 | from 10 | 3-4 times a year |
| Chest, areolas | 6-10 | from 10 | 3-4 times a year |
| Thighs, legs | 6-10 | from 10 | 3-4 times a year |
The numbers in the table are a guide. The specialist builds the exact plan on how your hair responds from session to session. If an endocrinologist has started treatment alongside the course, noticeably fewer new hairs appear and maintenance gets rarer.
Does laser make hormonal hair worse
Yes, the effect is documented and is called paradoxical hypertrichosis: after several sessions, fine fuzz at the edge of the treated area or inside it turns into darker, denser hair. It is almost always the face and neck. The Endocrine Society guideline specifically advises warning women of Mediterranean and Middle Eastern origin with facial hair about this risk and considering electrolysis or a cream for them instead of laser. How common it is depends on who you count: a 2025 study of women in Jordan found increased facial growth in 16% after an alexandrite laser, most often in those with PCOS, irregular periods and olive or light brown skin. In the same study it was more common in women who had 6-10 sessions, which is why on a long facial course the area is checked at every visit. Regular use of sunscreen in the same study cut the risk threefold.
The specialist checks the area at every visit and sees if the hair around the treated patch has become denser. Then they widen the edge of the area and sets the power again. If the response does not change, electrolysis is a better fit for the remaining hairs: we do not offer it, in that case we recommend it for those hairs and continue the rest of the area with the laser.
Sources: Endocrine Society, Hirsutism guideline 2018, Lasers Med Sci 2025 (PubMed)
Endocrinologist and tests: what to do before the course
If male-pattern hair appeared recently or there is a lot of it, it makes sense to see an endocrinologist or gynaecologist before the course. The doctor will order a blood test for hormone levels, an examination and, if needed, an ultrasound. Laser and treatment do not get in each other's way: one removes the hair, the other lowers the trigger for new growth. The same Endocrine Society guideline recommends, when excess androgens are confirmed, combining hair removal with treatment so that less new hair grows.
The salon specialist does not diagnose or prescribe tests. But at the consultation they do ask about your cycle, medications and when the hair appeared, because the plan of the course depends on the answers.
Sources: NHS (UK), Hirsutism, Endocrine Society, Hirsutism guideline 2018
Chin, upper lip and grey hairs
On the face, the most common areas with a hormonal cause are the chin and upper lip. The hair there is coarse and dark, the laser picks it up well, but it regrows more stubbornly than on the body and the course takes longer, more in the article on upper lip laser hair removal. The face is not shaved before a session, the specialist looks at the hair on the spot.
Grey and white hairs on the chin, which many women get after forty, are invisible to the laser: they have no pigment. Electrolysis remains for those, while the laser removes the dark hairs next to them. More on what the laser can and cannot pick up in the article on light and grey hair.
Home devices for hirsutism
Home IPL devices are built for ordinary fine hair and low power. They remove coarse hormonal hair poorly: in the PLOS ONE 2023 study a home device gave 46-52% against 85-88% for a salon diode laser. And in the British study from 2005, weak flashes reduced facial hair severity in women with PCOS only from 7.1 to 6.1 against 7.3 to 3.6 at full power. A comparison using study figures is in the article home IPL versus salon laser.
Sources: PLOS ONE 2023, Br J Dermatol 2005 (PubMed)
How it works with us
At the consultation we ask when the hair appeared, whether you have a diagnosis and whether you take anything prescribed by a doctor. If male-pattern hair appeared recently, we recommend seeing an endocrinologist alongside the course. We work with a hybrid laser, alexandrite, diode and neodymium ranges, with contact cooling, so it suits both fair and darker skin. A facial session starts at 450 Kč. The specialist sets the power for the face and for the body and checks at every visit how the area responded. With a hormonal cause we give you a realistic plan straight away: from 12 sessions on the face, from 10 on the body, maintenance 3-4 times a year, with no promise that six sessions close the matter.
Reviewed by: MEDULLA team