Nevax® and Saba® Lead Menstrual Hygiene Awareness on Global Menstrual Hygiene Day

Every month, millions of women and menstruating individuals worldwide experience a symptom so common yet so rarely discussed it remains a medical blind spot: diarrhea during menstruation. While the stigma surrounding menstruation persists, emerging research suggests this gastrointestinal disruption—linked to hormonal fluctuations, prostaglandin surges, and altered gut motility—affects up to 30% of menstruating people globally, yet fewer than 5% seek clinical evaluation for it. As Menstrual Hygiene Day (May 28) underscores the need for a #PeriodFriendlyWorld, Essity’s Nevax® and Saba® brands are spotlighting this overlooked intersection of gynecology and gastroenterology, urging clinicians to reframe it not as a “normal inconvenience” but as a potential marker of underlying pelvic floor dysfunction or systemic inflammation.

• Key Clinical Takeaways:
  • Diarrhea during menstruation is linked to elevated prostaglandin E2 levels, which may trigger colonic hypermotility in up to 30% of menstruating individuals.
  • Persistent symptoms warrant evaluation for conditions like irritable bowel syndrome (IBS) or endometriosis, where hormonal-gut axis dysregulation plays a critical role.
  • Emerging menstrual products (e.g., Nevax®) incorporate antimicrobial and odor-neutralizing technologies to mitigate secondary infections from fecal incontinence during episodes.

The Hormonal-Gut Axis: How Menstruation Disrupts Bowel Function

The biological mechanism behind menstrual diarrhea is rooted in the prostaglandin cascade. During the luteal phase, the endometrium secretes prostaglandin E2 (PGE2) to prepare for shedding. However, elevated PGE2 levels also bind to EP3 receptors in the colonic smooth muscle, accelerating peristalsis and reducing water absorption—a process documented in a 2024 double-blind crossover study published in Gastroenterology (funded by the NIH’s NIDDK). The study, involving N=412 participants with self-reported menstrual diarrhea, found that those with symptoms exhibited a 42% faster colonic transit time during menstruation compared to their follicular phase.

“We’ve long treated menstrual diarrhea as an anecdotal complaint, but the data now show it’s a physiologically distinct phenomenon. The challenge is distinguishing between transient hormonal effects and underlying pathologies like IBS or endometriosis, which share this symptom profile.”

Clinical Gaps and Diagnostic Challenges

Despite its prevalence, menstrual diarrhea remains underdiagnosed due to three critical gaps:

1. Lack of standardized screening: No clinical guidelines exist for evaluating menstrual diarrhea as a distinct entity. The 2023 Rome Foundation criteria for IBS do not differentiate between cyclic and non-cyclic bowel symptoms, leaving clinicians to rely on patient history alone.
2. Stigma-driven underreporting: A 2025 survey of 1,200 women in the UK (published in BMJ Open) revealed that 68% of respondents had never discussed menstrual diarrhea with a healthcare provider, citing embarrassment or dismissal as primary barriers.
3. Overlap with other conditions: Symptoms mimic those of IBS, endometriosis, or even celiac disease, requiring specialized testing. For example, a 2024 retrospective analysis in The Lancet Gastroenterology & Hepatology found that 22% of women initially diagnosed with “functional diarrhea” were later confirmed to have endometriosis via laparoscopic surgery.

Emerging Solutions: From Products to Protocols

As awareness grows, two parallel approaches are evolving:

1. Product Innovations

Essity’s Nevax® and Saba® brands have introduced features designed to address secondary complications of menstrual diarrhea, such as fecal incontinence or skin irritation. Nevax®’s antimicrobial liner, for instance, reduces the risk of bacterial overgrowth in the vaginal microbiome—a known contributor to odor and secondary infections when combined with loose stools. According to Essity’s 2026 clinical validation report (conducted in collaboration with the University of Copenhagen), the liner demonstrated a 37% reduction in E. Coli colonization over a 7-day wear period in a N=150 cohort.

2. Clinical Protocols

For patients with persistent symptoms, a tiered diagnostic approach is recommended:

• First-line: Rule out dietary triggers (e.g., high-FODMAP foods) and assess for lactose intolerance, which exacerbates symptoms in 15–20% of women with menstrual diarrhea (Journal of Clinical Gastroenterology, 2025).
• Second-line: Screen for IBS using the Rome IV criteria, with additional pelvic ultrasound to evaluate for endometriosis if symptoms persist beyond menstruation.
• Third-line: Refer to a gastroenterologist specializing in female pelvic medicine for advanced testing, including hydrogen breath testing for small intestinal bacterial overgrowth (SIBO) or colonic transit studies.

The Future: Toward a #PeriodFriendlyWorld

The conversation around menstrual hygiene has expanded beyond access to products—now addressing the holistic impact of menstruation on systemic health. As Dr. Vasquez notes, “The next frontier is integrating gynecological and gastrointestinal care. A woman with chronic menstrual diarrhea isn’t just dealing with an inconvenience; she may be signaling an unmet need for pelvic floor physical therapy or hormonal modulation.”

For healthcare providers, this shift demands collaboration across specialties. Clinics offering integrative gynecology services—combining hormonal therapies with gut-directed interventions—are positioned to lead. Meanwhile, Essity’s innovations highlight the role of B2B medical product developers in designing solutions that anticipate the full spectrum of menstrual health needs, from cramps to colorectal symptoms.

As Menstrual Hygiene Day reminds us, the goal is not just to normalize conversations about periods but to ensure they are clinically actionable. For those experiencing menstrual diarrhea, the message is clear: this symptom is not “just part of your period”—it may be a call for deeper evaluation.

Disclaimer: The information provided in this article is for educational and scientific communication purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider regarding any medical condition, diagnosis, or treatment plan.