Dermatologists order androgen blood tests for stubborn acne because hormones — specifically androgens like testosterone, DHEA-S, and DHT — are often the hidden engine driving breakouts that refuse to respond to topical treatments and antibiotics. Roughly half of adult women with acne have elevated androgen levels in their blood, and among those with seemingly normal levels, an additional 50 to 60 percent still show increased androgen metabolites, pointing to a subtler form of hormonal excess that standard treatments alone cannot address. When a patient has cycled through retinoids, benzoyl peroxide, and multiple rounds of antibiotics without lasting improvement, bloodwork helps the dermatologist determine whether the problem is coming from inside the body rather than just the skin’s surface. Consider a 28-year-old woman who has dealt with deep, cystic jawline acne for years.
Her over-the-counter products barely make a dent, and even prescription-strength topicals provide only temporary relief. Her dermatologist orders a panel that includes total testosterone, free testosterone, DHEA-S, androstenedione, sex hormone-binding globulin, and prolactin. The results reveal elevated DHEA-S and low SHBG — a pattern suggesting her body is producing excess androgens that are fueling sebum production at the follicular level. That single blood draw changes the entire treatment direction, moving her toward hormonal therapy rather than yet another topical. This article covers which specific hormones are tested and why each one matters, when dermatologists recommend testing versus when they skip it, what the latest guidelines say about evaluating androgen excess, and what your results actually mean for treatment — including why normal bloodwork does not necessarily rule out a hormonal cause.
Table of Contents
- What Androgen Blood Tests Reveal About Stubborn Acne
- When Dermatologists Recommend Hormonal Testing and When They Don’t
- Why Normal Blood Results Don’t Rule Out Hormonal Acne
- How Test Results Shape Your Acne Treatment Plan
- The 2025 Guidelines and What They Mean for Patients
- DHEA-S as a Specific Diagnostic Marker
- The Future of Hormonal Acne Diagnosis
- Conclusion
- Frequently Asked Questions
What Androgen Blood Tests Reveal About Stubborn Acne
The standard androgen panel for acne is not a single test but a collection of markers that together paint a picture of hormonal activity. Dermatologists typically request total testosterone, free testosterone, DHEA-S, androstenedione, SHBG, and prolactin. Each serves a distinct purpose. Total testosterone measures the overall androgen load in circulation, while free testosterone — the fraction not bound to proteins — reflects what is actually available to act on tissues like the sebaceous glands. SHBG matters because it binds testosterone and effectively neutralizes it; low SHBG means more free testosterone is available to stimulate oil production, even if total testosterone looks normal on paper. DHEA-S deserves particular attention because it is the most abundant circulating androgen in both men and women.
Produced primarily by the adrenal glands, DHEA-S is converted by sebocytes and dermal papilla cells directly into testosterone and DHT, the androgen most responsible for driving sebum production. This is why a patient can have a normal testosterone reading but an elevated DHEA-S and still present with aggressive hormonal acne — the conversion is happening locally in the skin. The connection between DHEA-S and acne is not theoretical; acne onset in children correlates directly with the DHEA-S surge during adrenarche, typically between ages six and eight, which is the earliest hormonal trigger for sebaceous gland activation. Comparing these markers side by side is what gives dermatologists actionable information. A patient with high free testosterone but normal DHEA-S may have ovarian-driven androgen excess, potentially pointing toward polycystic ovary syndrome. A patient with elevated DHEA-S but normal testosterone may have an adrenal source, possibly suggesting late-onset congenital adrenal hyperplasia. Without the full panel, the dermatologist is guessing at the source, and the source determines the treatment.
When Dermatologists Recommend Hormonal Testing and When They Don’t
Not every acne patient gets a blood test, and the major dermatological organizations do not fully agree on when testing should happen. The androgen Excess and PCOS Society takes a broad stance, recommending that serum total testosterone, free testosterone, and DHEA-S be measured using high-quality assays in all women with adult acne. Their reasoning is straightforward: androgen excess is common enough in this population that routine screening catches cases that would otherwise be missed and treated ineffectively. The American Academy of Dermatology takes a more conservative position. The AAD does not recommend routine androgen measurement in all women with adult acne. Instead, it recommends a hormonal workup specifically when clinical features of hyperandrogenism are present.
Those features include irregular or infrequent menstrual periods, hirsutism, androgenetic alopecia, infertility, polycystic ovaries, clitoromegaly, or truncal obesity. DermNet NZ similarly recommends blood tests when signs suggest hyperandrogenism, noting that these signs could indicate underlying conditions such as PCOS or congenital adrenal hyperplasia. However, this conservative approach has a significant limitation. If a dermatologist only tests when obvious signs of hyperandrogenism are present, they will miss the substantial number of women whose androgen excess is biochemical rather than clinical. A woman with persistent jawline and chin acne but regular periods and no excess body hair might never get tested under the AAD framework, even though her acne is hormonally driven. This is where clinical judgment comes in — many dermatologists order bloodwork when acne is resistant to conventional treatments regardless of whether the textbook signs of hyperandrogenism are present, especially when the pattern and location of breakouts suggest a hormonal component.
Why Normal Blood Results Don’t Rule Out Hormonal Acne
One of the most confusing aspects of hormonal acne for patients is learning that their blood tests came back normal. It feels like a dead end — if the hormones are fine, what is causing the acne? But normal circulating androgen levels do not mean the skin is responding normally to those androgens. Some patients develop hormonal acne because of increased 5-alpha-reductase activity in the pilosebaceous unit, which converts testosterone into DHT locally within the skin. DHT is significantly more potent than testosterone at stimulating sebum production, and this conversion happens at the tissue level where standard blood tests cannot detect it. This concept, sometimes called skin hypersensitivity to androgens, explains a clinical scenario dermatologists encounter regularly. A woman presents with classic hormonal acne — deep, inflammatory lesions along the jawline and lower face that flare with her menstrual cycle.
Her blood panel comes back within normal ranges. A less experienced clinician might dismiss the hormonal connection, but the pattern tells a different story. The sebaceous glands in her skin are essentially amplifying the androgen signal, responding to normal hormone levels as though they were elevated. Research confirms that anti-androgen treatment can still be appropriate and effective in these cases precisely because of this local sensitivity. For patients, this means a normal blood test is not the end of the conversation — it is information that narrows the picture. It tells the dermatologist that the problem is likely peripheral rather than central, which actually still supports hormonal therapy as a treatment approach. Spironolactone, for instance, works partly by blocking androgen receptors in the skin, which addresses the local sensitivity problem regardless of what is circulating in the blood.
How Test Results Shape Your Acne Treatment Plan
The practical value of androgen blood tests lies in how they redirect treatment. Without bloodwork, a dermatologist treating stubborn acne might continue escalating through the standard ladder: stronger retinoids, combination antibiotics, possibly isotretinoin. With bloodwork showing elevated androgens, the approach shifts to treatments that address the hormonal root cause, which can be more effective and more sustainable. Hormonal therapy for acne primarily involves two classes of medication: oral contraceptives and anti-androgens like spironolactone. A 2024 review in Dermatology and Therapy found that spironolactone is a viable first-line treatment for women with acne, and importantly, it is effective whether or not serum androgens are elevated. This is a meaningful distinction. Oral contraceptives work by increasing SHBG, which binds more free testosterone and reduces the amount available to stimulate sebaceous glands.
Spironolactone works by directly blocking androgen receptors and reducing androgen production. The choice between them — or using both together — often depends on what the blood tests reveal and the patient’s other health considerations. The tradeoff patients should understand is that hormonal therapies require patience and commitment. Spironolactone typically takes three to six months to show full results, and its effects reverse when the medication is stopped. Oral contraceptives carry their own risk profile, including considerations around blood clotting, especially for smokers or women over 35. For patients whose bloodwork reveals a specific condition like PCOS, treatment may also involve metformin or lifestyle modifications alongside acne-specific therapy. The blood test does not just guide acne treatment — it sometimes uncovers a broader endocrine issue that warrants its own management.
The 2025 Guidelines and What They Mean for Patients
The landscape of hormonal acne evaluation continues to evolve. The Society for Endocrinology published a 2025 clinical practice guideline for the evaluation of androgen excess in women, providing updated diagnostic approaches and comprehensive testing protocols for conditions presenting with acne, hirsutism, and other androgen-related symptoms. These guidelines reflect a growing recognition that androgen excess is underdiagnosed and that more systematic evaluation can catch conditions early, before they cause significant quality-of-life impact or fertility complications. One important warning for patients: the timing and methodology of blood tests matter significantly, and not all labs handle androgen assays with the same precision. The AE-PCOS Society specifically recommends high-quality assays for measuring testosterone and its fractions, because standard immunoassays used by some commercial labs can be unreliable at the lower hormone concentrations typical in women.
A test result that reads “normal” from a less precise assay might actually represent an elevated level if measured with liquid chromatography-tandem mass spectrometry, the gold standard method. Patients should ask their dermatologist whether the lab being used runs high-sensitivity assays, particularly for free testosterone. Additionally, blood draws should ideally occur in the early morning during the follicular phase of the menstrual cycle — typically days one through seven — for the most interpretable results. Samples drawn at other times can show different values due to normal hormonal fluctuations, which may lead to false reassurance or unnecessary concern. If a patient is on hormonal contraceptives, this complicates interpretation further, and the dermatologist may need to assess whether stopping the medication temporarily for testing is worthwhile.
DHEA-S as a Specific Diagnostic Marker
Among the hormones in the standard acne panel, DHEA-S holds a unique diagnostic position because it is produced almost exclusively by the adrenal glands. Unlike testosterone, which can come from both the ovaries and the adrenals, an elevated DHEA-S points specifically to an adrenal source of androgen excess. The Cleveland Clinic and MedlinePlus both note that the DHEA-S test is specifically indicated when women show signs of excess male hormones, including male-pattern body changes, excess hair growth, oily skin, acne, irregular periods, or infertility.
This specificity makes DHEA-S particularly valuable for differential diagnosis. A young woman with acne, elevated DHEA-S, and normal testosterone might be evaluated for non-classic congenital adrenal hyperplasia, a condition that is far more common than many clinicians realize and is frequently misdiagnosed as simple acne or PCOS. Identifying this condition changes not just the acne treatment but the patient’s long-term medical management, including implications for future pregnancies.
The Future of Hormonal Acne Diagnosis
The direction of hormonal acne research is moving toward more nuanced and individualized testing. As understanding of local androgen metabolism in the skin improves, future diagnostics may include markers that reflect what is happening at the tissue level rather than relying solely on circulating hormone concentrations. Measuring androgen metabolites in sebum or skin biopsies, while still largely in the research phase, could eventually close the gap between patients whose blood tests look normal and whose skin tells a different story.
For now, the standard androgen panel remains a powerful and underutilized tool. As the 2025 endocrinology guidelines gain wider adoption and more dermatologists adopt systematic hormonal evaluation for treatment-resistant acne, fewer patients should have to endure years of ineffective topical therapy before someone thinks to check their bloodwork. The blood draw takes minutes; the information it provides can redirect months or years of treatment.
Conclusion
Androgen blood tests give dermatologists a window into the hormonal machinery behind stubborn acne. By measuring total and free testosterone, DHEA-S, androstenedione, SHBG, and prolactin, clinicians can identify whether elevated androgens are driving breakouts, trace the source to the ovaries or adrenal glands, and uncover conditions like PCOS or congenital adrenal hyperplasia that require their own treatment. Even when results come back normal, the testing is not wasted — it tells the dermatologist that local skin sensitivity to androgens is the likely culprit, which still supports hormonal therapy as an effective approach.
If your acne has resisted multiple treatments and you have not had bloodwork done, it is worth asking your dermatologist about an androgen panel. Come prepared to discuss your menstrual history, any other symptoms like excess hair growth or hair thinning, and your family history of hormonal conditions. Request that the blood draw be scheduled during the early follicular phase for the most accurate results, and ask whether the lab uses high-sensitivity assays for testosterone measurement. These are reasonable, informed questions that can help ensure you get the most useful information from a straightforward set of tests.
Frequently Asked Questions
Do I need a referral to an endocrinologist for androgen blood tests, or can my dermatologist order them?
Most dermatologists can order a standard androgen panel directly. A referral to an endocrinologist is typically only necessary if the results suggest a complex hormonal condition like congenital adrenal hyperplasia, an adrenal tumor, or Cushing syndrome that requires specialized management beyond acne treatment.
Will my insurance cover androgen blood tests for acne?
Coverage varies by plan, but most insurers cover hormone panels when the ordering physician documents clinical indications such as treatment-resistant acne, irregular menstruation, or signs of hyperandrogenism. Your dermatologist’s documentation of why the tests are medically necessary is the key factor in approval.
Can men get androgen blood tests for acne too?
Yes, though it is less commonly ordered for men because most men have higher baseline androgen levels. Testing in men is typically reserved for cases where acne is unusually severe, late-onset, or accompanied by other signs of endocrine dysfunction. The standard panel is similar but interpreted against male reference ranges.
How long does it take to get androgen blood test results back?
Most commercial labs return results within two to five business days. High-sensitivity assays using liquid chromatography-tandem mass spectrometry may take slightly longer — up to seven to ten days — depending on the lab, but provide more accurate measurements, particularly for free testosterone in women.
If my androgen levels are normal, does that mean my acne is not hormonal?
No. Approximately 50 to 60 percent of women with adult acne and normal circulating androgen levels still show increased androgen metabolites, and some patients have heightened skin sensitivity to androgens due to increased 5-alpha-reductase activity. Normal blood results narrow the diagnosis but do not rule out a hormonal component. Anti-androgen treatments like spironolactone can still be effective in these cases.
Should I stop taking birth control pills before getting tested?
Oral contraceptives significantly alter hormone levels — they increase SHBG and suppress ovarian androgen production — which can mask underlying androgen excess. Your dermatologist may recommend discontinuing hormonal contraception for at least one to three months before testing if the goal is to assess your baseline hormonal status, but this decision should be made together based on your individual circumstances.
