- 01Speed of onset separates PCOS from a tumour
Acne and hair growth that built up slowly since the late teens, with a mildly high testosterone, fit PCOS. Masculinising changes over a few months, or a level above about 150 to 200 ng/dL, point to a tumour and need a doctor within days 2.
A high testosterone result is a clue to a cause, and in a woman of reproductive age the most likely cause by far is PCOS. The next steps are the same for almost everyone: repeat the test in the morning with a reliable assay, check free testosterone and a handful of related hormones, and look at how fast the symptoms arrived. Acne and hair growth that built up over years usually mean PCOS. Change over a few months points to a rarer cause, such as a tumour 2.
What counts as high testosterone for a woman
Adult women typically run a total testosterone of about 8 to 60 ng/dL (0.3 to 2.1 nmol/L) when measured by liquid chromatography with tandem mass spectrometry, the method labs call LC-MS/MS. Each lab sets its own upper limit, so read the range printed beside your total testosterone result. Levels also fall steadily from the 20s onward, so a value that is ordinary at 22 can be above range at 48.
The method matters at these low concentrations. The Endocrine Society's position statement on testosterone testing found that standard immunoassays, the cheaper automated tests, perform poorly at the levels seen in women and children 4. If your result is borderline, ask the lab or your doctor whether LC-MS/MS was used; the 2023 international PCOS guideline prefers it for the same reason 1.
Where an example result sits (female total testosterone, example value)ng/dL
| Total testosterone (woman) | What it usually means | What usually happens next |
|---|---|---|
| Within the lab range | Normal total; free testosterone can still be high | Check SHBG and free testosterone if symptoms fit |
| Above the range but under about 150 ng/dL (5 nmol/L) | Typical of PCOS, an inherited adrenal condition (non-classic CAH) or a medicine | Repeat in the morning, plus the follow-up tests below |
| Above about 150 to 200 ng/dL (5 to 7 nmol/L) | Possible ovarian or adrenal tumour | See a doctor within days; imaging is usually arranged |
CalculatorTestosterone converterYour report in nmol/L and every number here in ng/dL? Convert it in one step.Work it out Symptoms of high testosterone in women
Androgen excess shows up on the skin and in the cycle. The common signs are irregular or missed periods, coarse dark hair on the upper lip, chin, chest or lower belly, persistent acne past the teenage years, oily skin, and thinning at the crown of the scalp (see hair loss and the blood tests behind it). Doctors grade body hair with the modified Ferriman-Gallwey score, which rates nine body areas from 0 to 4; a total of about 4 to 6 or more counts as hirsutism, with the cut-off varying by ethnic background 1.
High testosterone in women does not reliably cause weight gain, low mood or fatigue on its own. Those symptoms travel with PCOS and insulin resistance, so they are worth raising with a doctor, but a testosterone number does not explain them.
What causes high testosterone in women
PCOS accounts for most cases and affects about 10 to 13% of women of reproductive age 1. The rest of the list matters because several of the other causes look like PCOS on a first test, and a few of them need treatment of their own.
| Cause | How common | What points to it | The test that checks it |
|---|---|---|---|
| PCOS | Most common; about 10 to 13% of women | Irregular cycles and gradual acne or hair growth since the late teens | Clinical picture plus AMH or ultrasound, after mimics are ruled out |
| Non-classic congenital adrenal hyperplasia (CAH), an inherited adrenal enzyme shortfall | Uncommon; more frequent in some ancestries, such as Ashkenazi Jewish | Looks like PCOS, sometimes with a family history | Early-morning 17-hydroxyprogesterone |
| Medicines and supplements | Common and easy to miss | Testosterone, DHEA, anabolic steroids, some progestins | History; levels fall after stopping |
| A partner's testosterone gel | Uncommon | Rising levels without a cause; partner uses gel | History; levels fall when skin contact stops |
| Ovarian hyperthecosis (androgen-making cells spread through the ovary) | Uncommon; mostly after menopause | Slowly rising hair growth after menopause | Testosterone plus pelvic imaging |
| Cushing's syndrome | Rare | Weight gain at the trunk, purple stretch marks, high blood pressure | Cortisol tests |
| Androgen-secreting ovarian or adrenal tumour | Rare | Fast onset over months, virilisation, very high testosterone or DHEA-S | Testosterone, DHEA-S and imaging |
For non-classic CAH, the screen is a 17-hydroxyprogesterone (17-OHP) drawn early in the morning in the first days of the cycle. A value above about 200 ng/dL (6 nmol/L) usually leads to an ACTH stimulation test (an injection of the hormone that drives the adrenal glands, with blood taken before and an hour after) to confirm it 3. High prolactin and thyroid disease do not raise testosterone much, but they disturb the cycle in a similar way, which is why prolactin and TSH (thyroid-stimulating hormone) sit on the standard work-up; the page on high prolactin covers that branch. Cushing's syndrome has its own page.
Women and children can absorb testosterone gel from a partner's skin, and the product labels carry a boxed warning about this secondary exposure. Washing the application site, covering it with clothing and avoiding skin contact until it dries are the usual fixes.
Markers that tell the causes apart
High testosterone and PCOS
Adults are diagnosed with PCOS when they have two of three features: irregular cycles or no ovulation, androgen excess shown by symptoms or blood tests, and polycystic ovaries on ultrasound or a high AMH (anti-Müllerian hormone) 1. The two-of-three rule has two consequences. You can have PCOS with a perfectly normal testosterone, and a high testosterone does not prove PCOS, because the diagnosis is only made after CAH, thyroid disease, high prolactin and tumours are excluded 1.
Insulin is the link most women with PCOS can act on. The 2023 guideline treats insulin resistance as a core feature of PCOS in women of every body size 1, and high insulin feeds androgen excess in two ways at once.
How insulin resistance raises free testosterone
A fasting insulin shows whether insulin is driving the androgens, and the HOMA-IR calculator turns fasting glucose and insulin into one insulin resistance score. The insulin resistance page covers the tests and what helps.
Free testosterone and SHBG: why the total is only part of the answer
Only the unbound and loosely bound testosterone reaches hair follicles and skin; the SHBG page explains the binding. What matters for women is the consequence: when SHBG is low, as it often is with PCOS, insulin resistance or higher body weight, free testosterone and bioavailable testosterone can be high while the total sits inside the range. A high bioavailable result in a woman therefore points the same way as a high free testosterone.
How free testosterone is measured matters. The Endocrine Society's position statement advises against direct (analogue) free testosterone immunoassays because they are inaccurate; equilibrium dialysis, or a value calculated from a reliable total testosterone and SHBG, is the better choice 4. The PCOS guideline accepts calculated free testosterone, the free androgen index (total testosterone divided by SHBG) or calculated bioavailable testosterone 1.
CalculatorFree testosterone calculatorHave a total testosterone and an SHBG? Work out free and bioavailable testosterone from them.Work it out Getting an accurate testosterone test
- 1Test in the morningTestosterone runs higher early in the day, so a morning draw is the standard and makes repeat results comparable.
- 2Time it to the cycleIf you have periods, the early follicular phase (days 2 to 5 of the cycle) is the usual window; the female hormone panel page explains why cycle day matters.
- 3Know what the pill doesThe combined pill raises SHBG and lowers free testosterone, which can hide androgen excess 2. The PCOS guideline suggests testing off hormonal contraception for about three months where that is possible and safe; agree any change with your doctor and use other contraception meanwhile 1.
- 4Ask for LC-MS/MSAt female levels, LC-MS/MS is more reliable than a standard immunoassay 4.
- 5Repeat a single highDoctors usually confirm a single mildly high value with a repeat before acting. The blood test preparation guide covers fasting and supplements such as biotin.
The 2023 guideline sets a testing order: total and free testosterone first, then androstenedione and DHEA-S if those are normal but suspicion remains 1. Doctors usually add 17-OHP, prolactin and TSH, and often LH and FSH to check ovulation and rule out early menopause.
We suggest against testing for elevated androgen levels in women with isolated mild hirsutism because the likelihood of identifying a medical disorder that would change management or outcome is extremely low.Endocrine Society hirsutism guideline, Martin et al., 2018 2
That recommendation explains why some doctors decline to test a woman with a few chin hairs and regular periods. Testing becomes worthwhile once hair growth is moderate or worse, or comes with irregular periods, acne, scalp thinning or any sign of virilisation.
How high testosterone in women is treated
How to lower high testosterone in women depends on the cause. For PCOS-related hirsutism and acne in women who do not want to conceive, the Endocrine Society guideline makes the combined oral contraceptive the first-line medicine for most premenopausal women 2. If hair growth is still bothersome after about six months, an antiandrogen such as spironolactone can be added 2.
Where insulin resistance is part of the picture, weight loss of around 5 to 10% in women with excess weight and regular exercise lower insulin and can bring periods back 1. The PCOS guideline also supports metformin, a prescription medicine rather than a supplement, for metabolic features 1; it modestly lowers testosterone but is weaker than the pill for hair growth, and whether it fits is a decision for your doctor. Laser or electrolysis treats hair already present. Hair follicles grow slowly, so most women judge a medicine over six months rather than six weeks. Non-classic CAH is managed by an endocrinologist, and a tumour is treated with surgery, after which testosterone usually falls back to normal.
High testosterone in men: TRT and above-range levels
In men, a total testosterone above the lab range (the total testosterone page gives the male range) is almost always from testosterone therapy (TRT) or anabolic steroid use. A high level without treatment is uncommon and worth a repeat test and a look at LH, since rare testicular or adrenal tumours and CAH can cause it. For men on TRT, a draw a day or two after an injection catches the peak, so the Endocrine Society guideline measures levels midway between injections of testosterone enanthate or cypionate 5; your prescriber decides when to draw and what any result means for the dose.
Is high testosterone good? The benefits of treatment come from correcting a deficiency. The Endocrine Society aims for mid-normal levels on treatment, with checks at 3 to 12 months and then yearly 5, and no trial has shown that pushing above the range does more. Hematocrit is the red-cell share of the blood; very high values are linked to a higher risk of clots, so guidelines treat 54% as the point to act.
On heart risk, the TRAVERSE trial gave testosterone gel or placebo to 5,246 men with low testosterone and cardiovascular risk. Major cardiac events occurred in 7.0% on testosterone and 7.3% on placebo (hazard ratio 0.96), but atrial fibrillation (an irregular heartbeat; 3.5% vs 2.4%), pulmonary embolism (a clot in the lung; 0.9% vs 0.5%) and acute kidney injury (2.3% vs 1.5%) were more frequent 6. TRAVERSE treated men up to the normal range, so it offers no support for going above it. Above-range levels are also commonly linked with lower HDL cholesterol, higher estradiol through conversion, and faster scalp hair loss in men prone to it, through DHT (dihydrotestosterone, a stronger hormone made from testosterone).
For the full male panel, see the male hormone panel guide; for the other end of the range, see low testosterone.
High testosterone after menopause
Testosterone usually drifts down after menopause. New or worsening hair growth, scalp thinning or a rising testosterone after menopause should be investigated, and the two main causes doctors look for are ovarian hyperthecosis and an androgen-secreting tumour. A postmenopausal woman with a testosterone near or above the premenopausal upper limit, or any virilising sign, should see a doctor within days.
When to see a doctor
| Situation | How soon |
|---|---|
| Total testosterone above about 150 to 200 ng/dL (5 to 7 nmol/L), or a very high DHEA-S | Within days |
| Voice deepening, clitoral enlargement or rapid hair growth over months | Within days |
| Rising testosterone or new hair growth after menopause | Within days |
| On TRT with hematocrit above 54% | Contact your prescriber promptly |
| Irregular periods with acne or extra hair, and a mildly high result | Routine appointment |
| Mild chin or upper-lip hair with regular periods | Testing is usually not needed; raise it with a doctor if it bothers you or other symptoms appear |
The hormones hub gathers the related markers.
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Citations
- Teede HJ et al. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. J Clin Endocrinol Metab 2023
- Martin KA et al. Evaluation and Treatment of Hirsutism in Premenopausal Women: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab 2018
- Speiser PW et al. Congenital Adrenal Hyperplasia Due to Steroid 21-Hydroxylase Deficiency: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab 2018
- Rosner W et al. Position statement: Utility, limitations, and pitfalls in measuring testosterone. J Clin Endocrinol Metab 2007
- Bhasin S et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab 2018
- Lincoff AM et al. Cardiovascular Safety of Testosterone-Replacement Therapy (TRAVERSE). N Engl J Med 2023
Educational context only, not medical advice or a diagnosis. Always discuss your results with a clinician.
