Excess hair
Excess hair may mean hirsutism—coarse hair in an androgen-sensitive pattern—or hypertrichosis, increased hair growth outside that pattern. Normal hair density varies with genetics, age and background. The distinction matters when assessing possible hormonal causes.
What you may notice
- Coarse dark hair on the face, chest or abdomen
- Increased hair on arms, legs or trunk
- Hair growth accompanied by acne
- Irregular periods or scalp thinning
- A sudden increase over months
Why it can happen
Hirsutism commonly reflects polycystic ovary syndrome, increased androgen levels or greater follicle sensitivity. Some medicines and rarer hormonal disorders also contribute. Hypertrichosis may be inherited, medicine-related or associated with another condition. Sometimes no cause is found.
What may help
Shaving, waxing, depilatories and electrolysis remove hair without treating an underlying cause. Laser offers longer-term reduction and works best when pigment and wavelength are appropriately matched; darker skin needs suitable devices and settings. Medical treatment may help hormonally driven growth after assessment, but results take time.
When to consult
Consult a clinician for new or rapidly increasing coarse hair, irregular periods, deepening voice, increased muscle, severe acne or other hormonal symptoms. Gradual stable unwanted hair can be discussed for safe removal options.
Evidence and sources
- DermNet. Hypertrichosis [Internet]. Auckland: DermNet; 2016 [cited 2026 Nov 7]. Available from: https://dermnetnz.org/topics/hypertrichosis (new tab)
- National Health Service. Excessive hair growth (hirsutism) [Internet]. London: National Health Service; 2025 [cited 2026 Nov 7]. Available from: https://www.nhs.uk/symptoms/hirsutism/ (new tab)
- DermNet. Hyperandrogenism [Internet]. Auckland: DermNet; 2014 [cited 2026 Nov 7]. Available from: https://dermnetnz.org/topics/hyperandrogenism (new tab)