You have tried every cleanser, serum, and spot treatment on the market. Your skincare routine is meticulous. Yet those deep, painful breakouts along your jawline, chin, and lower cheeks keep coming back - and can flare right before your period.
This may not be a skincare problem. This may be a hormone problem. And topical treatment may not resolve it until you address what is happening inside your body.
What Makes Acne "Hormonal"?
All acne is technically influenced by hormones, but the term hormonal acne can refer to breakouts driven by androgens - hormones like testosterone and DHEA-S that can stimulate oil production in the skin.
How Androgens Can Cause Acne
1. Androgens can stimulate sebaceous (oil) glands to produce excess sebum 2. Excess sebum can clog pores and create an environment for bacteria 3. Inflammation can develop as the immune system responds 4. Deep, cystic lesions can form, particularly in hormone-sensitive areas
The Telltale Pattern
Hormonal acne can have a characteristic presentation:
- Location: Jawline, chin, lower cheeks, and neck (the "beard distribution" area, which has the highest concentration of androgen receptors)
- Type: Deep, cystic, or nodular lesions rather than surface-level whiteheads
- Timing: Can flare premenstrually (when progesterone drops and the relative androgen effect can increase)
- Persistence: May not respond well to typical over-the-counter acne treatments
- Age: Can begin or worsen in the mid-20s to 30s, unlike typical teenage acne
The Hormonal Drivers That Can Be Behind Your Breakouts
1. Excess Androgens and PCOS
Polycystic ovary syndrome may be one of the most common causes of hormonal acne in women. Up to 70-80% of women with PCOS may experience acne as a symptom. In PCOS, the ovaries and adrenal glands can produce excess androgens, which can directly stimulate sebaceous glands.
But here is the nuance: you may not need a PCOS diagnosis to have androgen-driven acne. Some women may have mildly elevated androgens that do not meet full PCOS criteria but can still be enough to trigger breakouts.
2. Low SHBG: It Can Be a Hidden Culprit
Even with normal total testosterone, acne can be driven by low SHBG (sex hormone-binding globulin). When SHBG is low, more free testosterone can be available to act on skin cells. This is why checking both total testosterone and SHBG is essential - total testosterone alone can be misleading.
Causes of low SHBG can include:
- Insulin resistance
- High-sugar, high-refined-carbohydrate diets
- Obesity
- Hypothyroidism
3. Insulin Resistance and Skin Health
The connection between insulin and acne can be powerful and well-documented. Elevated insulin:
- Can stimulate androgen production by the ovaries
- Can lower SHBG, increasing free testosterone
- Can increase IGF-1 (insulin-like growth factor 1), which can directly stimulate sebaceous gland activity and keratinocyte proliferation
- Can promote inflammation throughout the body, including the skin
This is why dietary interventions that improve insulin sensitivity can have dramatic effects on acne - sometimes more effective than topical treatments.
4. Cortisol and Stress-Related Breakouts
Chronic stress can elevate cortisol, which can have several acne-promoting effects:
- Can increase skin oil production directly
- Can impair skin barrier function, making skin more vulnerable to inflammation
- Can raise blood sugar and insulin, indirectly worsening androgen activity
- Can disrupt the gut microbiome, which can influence skin health through the gut-skin axis
If your breakouts worsen during stressful periods, cortisol may be a contributing factor.
5. The Estrogen-Progesterone Balance
In the second half of your cycle, progesterone can rise. Progesterone has mild androgenic activity and can increase sebum production. When estrogen (which has anti-androgenic effects) drops relative to progesterone before your period, the net effect can be increased androgen activity on the skin.
Women with estrogen dominance or luteal phase defects may experience different patterns of hormonal breakouts depending on their specific imbalance.
Which Lab Tests to Request
If you suspect hormonal acne, the following lab panel provides a comprehensive picture:
Essential Hormone Markers
- Total testosterone - overall androgen production
- Free testosterone (or calculated free testosterone) - the biologically active fraction
- DHEA-S - adrenal androgen marker (can be elevated in adrenal-driven acne)
- SHBG - can determine how much free testosterone is available
- Estradiol - primary estrogen
- Progesterone (mid-luteal, cycle day 21) - ovulation quality and balance
Metabolic Markers
- Fasting insulin - can be an early marker of insulin resistance
- Fasting glucose - baseline blood sugar
- HbA1c - 3-month average blood sugar
- HOMA-IR (calculated from fasting insulin and glucose) - insulin resistance index
Additional Considerations
- Thyroid panel (TSH, free T4, free T3) - hypothyroidism can lower SHBG and worsen androgen symptoms
- Cortisol - if stress is a significant factor
- Vitamin D - deficiency may be associated with more severe acne and insulin resistance
- Zinc - low zinc can be common in acne patients and zinc is essential for skin healing
Together, the hormonal and metabolic markers can identify androgen excess and insulin resistance, and the thyroid markers make sure thyroid-related contributions are not missed. See what we test.
Timing Your Tests
For the most accurate results:
- Test on cycle day 2-5 for testosterone, DHEA-S, SHBG, and other baseline hormones
- Test on cycle day 21 (or 7 days post-ovulation) for progesterone
- Fast for 10-12 hours before testing insulin and glucose
- Test in the morning when cortisol can be at its natural peak
The Diet Connection
Research increasingly supports the link between diet and acne:
High Glycemic Index Foods
Foods that can spike blood sugar rapidly (white bread, sugary snacks, processed foods) can increase insulin and IGF-1, which can worsen acne. A landmark study in the American Journal of Clinical Nutrition found that a low-glycemic-load diet can significantly reduce acne lesions compared to a conventional diet.
Dairy
Dairy, particularly skim milk, may be associated with increased acne in several large epidemiological studies. The mechanism may involve IGF-1 naturally present in milk and the insulinogenic properties of whey protein.
Anti-Inflammatory Foods
Conversely, diets rich in omega-3 fatty acids, vegetables, antioxidants, and fiber may be associated with less severe acne and better insulin sensitivity.
A Root-Cause Approach to Treatment
Rather than suppressing symptoms with topical treatments alone, consider addressing the underlying drivers:
- Insulin resistance: Low-glycemic diet, regular exercise, consider inositol or berberine supplementation
- High androgens: Anti-androgen therapies (spironolactone), spearmint tea, saw palmetto
- Low SHBG: Address insulin resistance, optimize thyroid function
- Cortisol excess: Stress management, sleep optimization, adaptogenic herbs
- Nutrient deficiencies: Zinc (30-50 mg daily), vitamin D (40-60 ng/mL may be optimal), omega-3 fatty acids
When to See a Specialist
Consider consulting a dermatologist or endocrinologist if:
- Your acne is severe, scarring, or significantly impacting quality of life
- Over-the-counter treatments have failed after 3 months
- You have other signs of hormonal imbalance (irregular periods, hair loss, hirsutism)
- You suspect PCOS or insulin resistance
References
- Elsaie, M. L. (2016). Hormonal treatment of acne vulgaris: an update. Clinical, Cosmetic and Investigational Dermatology, 9, 241-248. PMID 27621661
- Smith, R. N., et al. (2007). A low-glycemic-load diet improves symptoms in acne vulgaris patients: a randomized controlled trial. American Journal of Clinical Nutrition, 86(1), 107-115. PMID 17616769
- Adebamowo, C. A., et al. (2005). High school dietary dairy intake and teenage acne. Journal of the American Academy of Dermatology, 52(2), 207-214. PMID 15692464
- Melnik, B. C. (2012). Diet in acne: further evidence for the role of nutrient signalling in acne pathogenesis. Acta Dermato-Venereologica, 92(3), 228-231. PMID 22419445
- Arora, M. K., et al. (2011). Role of hormones in acne vulgaris. Clinical Biochemistry, 44(13), 1035-1040. PMID 21763298
- Cappel, M., et al. (2005). Correlation between serum levels of insulin-like growth factor 1, dehydroepiandrosterone sulfate, and dihydrotestosterone and acne lesion counts in adult women. Archives of Dermatology, 141(3), 333-338. PMID 15781674
