Endometriosis Flare-ups and Associated Risks

Definition and Prevalence

Endometriosis is a chronic, estrogen-dependent, inflammatory disease that affects approximately 2-10% of women of reproductive age worldwide, according to the American College of Obstetricians and Gynecologists 1

Endometriosis pain typically falls into three categories: secondary dysmenorrhea, deep dyspareunia, and sacral backache with menses, as classified by the American Family Physician 2
The depth of endometriosis lesions correlates with severity of pain, though the pain has little relationship to the type of lesions seen by laparoscopy, as reported by the American Family Physician and Praxis Medical Insights 2, 3

Chronic inflammation is associated with endometriosis, which can lead to varying intensity of symptoms over time, according to Stroke 4
Individuals with endometriosis have a 16-34% increased risk of stroke, as reported by Stroke and Praxis Medical Insights 4, 1

Up to 44% of women experience a recurrence of symptoms within one year after surgical treatment, according to the American Family Physician and Praxis Medical Insights 2, 3
First-line treatments include hormonal medications such as combined oral contraceptives and progestin-only options, as recommended by Praxis Medical Insights 5

The condition is associated with hypercholesterolemia, hypertension, and increased cardiovascular disease risk, according to Praxis Medical Insights 1
Screening for a history of endometriosis is reasonable to inform stroke risk assessment, as suggested by Stroke and Praxis Medical Insights 4, 1
In individuals with endometriosis, vascular risk factor evaluation and modification are reasonable to reduce stroke risk, according to Stroke and Praxis Medical Insights 4, 1

The American College of Obstetricians and Gynecologists confirms that oral norethindrone 0.35 mg daily or depot medroxyprogesterone acetate are effective alternatives to combined oral contraceptives for endometriosis treatment, with similar efficacy but without estrogen-related stroke risk 6
Progestin therapy helps reduce menstrual blood loss while managing endometriosis symptoms, according to the American family physician 6

GnRH agonists for at least three months provide significant pain relief and are appropriate for chronic pelvic pain, even without surgical confirmation of endometriosis, as stated in the American family physician 6
Add-back therapy must be implemented when using GnRH agonists long-term to reduce bone mineral loss without reducing pain relief efficacy, as recommended in the American family physician 6

For severe endometriosis, medical treatment alone may not be sufficient, and surgical referral is indicated if empiric therapy is ineffective, immediate diagnosis is necessary, or the patient desires pregnancy, according to the American family physician 6
Surgery provides significant pain reduction during the first six months, though up to 44% of women experience symptom recurrence within one year, as reported in the American family physician 6

Chronic non‑menstrual pelvic pain is defined as persistent pelvic discomfort lasting at least six months that occurs outside of the menstrual cycle, indicating a possible endometriosis etiology. 7

Endometriosis can rarely persist or recur in postmenopausal individuals who are not receiving hormone therapy, suggesting that disease may be maintained by scar tissue or reactivation mechanisms rather than estrogen dependence. 7