What it is
Excessive hair growth (hirsutism/hypertrichosis) describes unwanted hair growth in androgen-sensitive areas in women (hirsutism) or generalised excessive hair growth in any individual (hypertrichosis).
Unwanted or excessive hair growth — in androgen-sensitive areas in women (hirsutism) or generalised (hypertrichosis) — often linked to hormonal or medication causes.

At a glance
What it is
Excessive hair growth (hirsutism/hypertrichosis) describes unwanted hair growth in androgen-sensitive areas in women (hirsutism) or generalised excessive hair growth in any individual (hypertrichosis).
Commonly experienced as
Evidence context
Research-supportedSee the evidence snapshotSafety
See staying safeContext
Excessive hair growth encompasses two distinct presentations. Hirsutism describes the growth of coarse, dark terminal hair in women in a male-pattern distribution (face, chest, abdomen, back, inner thighs) driven by excess androgen activity. It affects approximately 5–10% of women of reproductive age and is most commonly caused by polycystic ovary syndrome (PCOS, ~72% of cases), idiopathic hirsutism, congenital adrenal hyperplasia, and — less commonly — androgen-secreting tumours or Cushing's syndrome. Hypertrichosis describes excessive hair growth anywhere on the body in either sex, not limited to androgen-sensitive areas, and may be congenital or acquired (medication-induced, paraneoplastic). Both conditions carry significant psychological impact, particularly in women.
The Evidence
What research and clinical practice say about excessive hair growth, its causes, and the options available.
Well-understood hormonally driven symptom with clear care pathways
Hirsutism is most commonly linked to PCOS and excess androgen activity, with established medical and cosmetic options. Integrative approaches such as inositol and dietary change show supporting evidence, particularly in PCOS-related cases.
Rapid-onset hirsutism with signs of virilisation warrants urgent investigation for androgen-secreting tumours. Cushingoid features alongside hirsutism — such as weight gain, stretch marks, or fat redistribution — should prompt screening for Cushing's syndrome. Very irregular periods with elevated testosterone requires specialist endocrine review. Do not delay seeking care if these features are present.
Combined oral contraceptives are first-line pharmacological options, reducing ovarian androgen output. Anti-androgens such as spironolactone are used in moderate-to-severe cases. Physical hair removal methods — laser, IPL, electrolysis — manage cosmetic concerns but do not address hormonal causes. Weight loss in overweight individuals with PCOS is shown to meaningfully reduce androgen levels.
Anti-androgens including spironolactone and cyproterone acetate must not be used during pregnancy due to risk of harm to a male foetus. Laser hair removal requires careful skin type assessment — without appropriate laser selection, people with darker skin tones face a higher risk of pigmentation changes. Always discuss these options with a qualified practitioner before starting.
PCOS accounts for around 72% of hirsutism cases in women of reproductive age. Other causes include idiopathic hirsutism, congenital adrenal hyperplasia, and — less commonly — androgen-secreting tumours or Cushing's syndrome. Hypertrichosis, a distinct presentation, may be medication-induced or congenital. Professional assessment is important to distinguish between these causes.
Spearmint tea has limited but emerging evidence for mild anti-androgenic effects. Myo-inositol has shown benefit for insulin sensitivity and hormonal parameters in PCOS. Low glycaemic index dietary patterns and adaptogenic herbs are commonly used in integrative practice. These approaches may complement — but are not a substitute for — professional medical assessment and care.
A GP or general practitioner is a useful first point of contact for assessment and referral. Endocrinologists and gynaecologists manage hormonal causes including PCOS and adrenal conditions. Dermatologists can advise on hair removal options. Integrative or naturopathic practitioners may support lifestyle and complementary strategies alongside conventional care.
Safety first
General, informational guidance — not diagnostic. A qualified practitioner can advise on your own situation.
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