Endometriosis doesn’t directly cause acne, but the two conditions share hormonal roots that make them frequent companions. About half of women with endometriosis report having acne, according to a cross-sectional study published in the International Journal of Women’s Dermatology. That rate is similar to the general population, which suggests the link isn’t straightforward. Instead, the connection runs through overlapping hormonal imbalances, inflammatory processes, and sometimes the very medications used to treat endometriosis.
The Hormonal Overlap
Endometriosis is an estrogen-dependent disease. The misplaced endometrial tissue that grows outside the uterus thrives on estrogen, and the body often produces more of it in response. What’s less obvious is how androgens fit into the picture. Endometriosis implants contain an enzyme called aromatase that can convert androgens into estrogen. This means the disease actively pulls from your androgen supply, but it also means androgen levels can fluctuate in ways that affect your skin.
Acne is driven primarily by androgens. These hormones stimulate oil glands in the skin, increasing sebum production. When excess sebum clogs pores, bacteria multiply and trigger inflammation. Estrogen also plays a role: acne in women peaks at puberty precisely when estradiol levels are climbing fastest. So both conditions sit at the intersection of estrogen and androgen activity, and disruptions in either hormone can feed both problems simultaneously.
When PCOS Is Also in the Mix
Polycystic ovary syndrome (PCOS) is one of the most common causes of hormonal acne in women, and it overlaps with endometriosis more often than many people realize. In a study of women undergoing gynecologic surgery, about 1 in 20 had both endometriosis and symptoms consistent with PCOS. In the general population, the overlap was roughly 1 in 50 women.
This matters because PCOS drives androgen levels significantly higher than endometriosis alone typically does. If you have both conditions, acne is far more likely, and it tends to be more persistent. Women with both diagnoses also had substantially higher rates of subfertility and chronic pelvic pain compared to women with either condition alone. So if you have endometriosis and are dealing with stubborn acne along with irregular periods, excess hair growth, or difficulty conceiving, the combination could point toward coexisting PCOS rather than endometriosis being the sole cause of your breakouts.
Inflammation and Skin Flares
Endometriosis is a chronic inflammatory condition. The misplaced tissue triggers an ongoing immune response, releasing inflammatory signals throughout the body. These same types of inflammatory molecules are involved in acne development, where they worsen redness, swelling, and the formation of deeper, more painful breakouts.
Many women with endometriosis notice that their symptoms, including skin changes, follow a cyclical pattern tied to menstruation. Pain, swelling, and flares tend to correspond with specific phases of the menstrual cycle. Acne commonly worsens in the days before and during a period, when progesterone drops and the relative influence of androgens on oil glands increases. If your breakouts reliably track your cycle and you also experience pelvic pain or heavy periods, that pattern is worth noting.
Endometriosis Treatments That Trigger Acne
Some of the hormonal therapies prescribed for endometriosis can make acne worse as a side effect. Progestin-only treatments, which are among the most commonly prescribed options, are a frequent culprit. Certain progestins have mild androgenic activity, meaning they can stimulate oil glands the same way your body’s own androgens do. The result is new or worsening breakouts that start after beginning treatment.
GnRH agonists, which suppress estrogen to shrink endometriosis tissue, can also shift your hormonal balance in ways that favor acne. By dramatically lowering estrogen, these medications remove one of the natural checks on sebum production. The low-estrogen state they create resembles menopause in many ways, and some women experience acne alongside hot flashes and other side effects.
If your acne appeared or worsened after starting endometriosis treatment, the medication is a likely contributor. This doesn’t necessarily mean you need to stop treatment, but it’s useful information to bring to your doctor so they can consider alternatives or add-on options that address both conditions.
Managing Acne Alongside Endometriosis
Treating acne when you have endometriosis requires some awareness of how the two interact. Combined oral contraceptives (those containing both estrogen and a progestin) can help with both conditions in some cases. The estrogen component raises a protein in the blood that binds free androgens, reducing their ability to stimulate oil glands. Certain progestins included in these pills also have anti-androgenic properties, which directly counteract acne.
Topical acne treatments like retinoids and benzoyl peroxide work on the skin surface and don’t interact with endometriosis management. They’re a practical option for mild to moderate breakouts regardless of what hormonal therapy you’re on. For more severe hormonal acne, anti-androgen medications can reduce oil production at the hormonal level, though these need to be coordinated with your overall treatment plan since they affect the same hormonal pathways that endometriosis therapies target.
Paying attention to timing helps, too. If your breakouts cluster around your period, starting targeted treatment a few days before your expected flare can reduce severity. Keeping a simple log of when breakouts appear relative to your cycle, and relative to any medication changes, gives you and your care team a clearer picture of what’s driving the problem.