The dangers of menstrual cup no one talks about

What you need to know before switching to this option
lady holding a menstrual cup
Photo credit: Shutterstock.com / Iryna Inshyna

Recent findings highlight critical safety concerns surrounding menstrual cups. While they are widely praised for sustainability and long wear time, improper use can lead to unexpected health issues. A documented case in a medical journal brought attention to complications stemming from incorrect cup placement, showing how positioning errors can cause urinary difficulties and discomfort.

Menstrual cups function by creating a seal within the vaginal canal, collecting rather than absorbing menstrual flow. However, incorrect insertion may put pressure on the urethra or bladder, leading to difficulty urinating, incomplete bladder emptying, or even an increased risk of infections. Medical experts emphasize that while such cases are not common, they underscore the need for accurate education on insertion and removal techniques.


Beyond placement issues, failure to maintain hygiene can contribute to infections. While the materials used in menstrual cups—typically medical-grade silicone or thermoplastic elastomers—are designed to be biocompatible, improper cleaning and extended wear beyond recommended limits can increase the risk of bacterial growth.

Usage patterns and adoption

The global rise in menstrual cup adoption varies by region and age group. While traditional disposable products remain dominant, more individuals are shifting to reusable alternatives due to environmental concerns and cost-effectiveness. Surveys suggest that approximately 19% of menstruating individuals worldwide have tried menstrual cups, with significantly higher adoption rates among younger users and those with access to menstrual health education.


Geographic trends show noticeable differences in adoption rates. In North America, about 10% of menstruators have integrated menstrual cups into their routine, while some European countries report higher acceptance. Awareness campaigns and accessibility largely influence these figures, as individuals with more knowledge about menstrual health are likelier to explore alternative period products.

Despite growing popularity, misinformation still surrounds menstrual cups. Many first-time users struggle with insertion techniques, removal difficulties, and uncertainties about safety. Addressing these concerns through better education can help ensure safer and more comfortable experiences for new users.

Technical considerations

Understanding material composition and wear time is essential for safety. Menstrual cups are typically made from hypoallergenic medical-grade silicone, rubber, or thermoplastic elastomers. These materials are chosen for their flexibility and durability, allowing users to wear them for extended periods without discomfort.

Unlike tampons, which absorb menstrual flow, cups collect it, reducing the risk of toxic shock syndrome. However, prolonged wear—especially exceeding 12 hours—can increase the risk of bacterial overgrowth. Regular removal, emptying, and thorough cleaning are essential steps in preventing infections.

Storage and maintenance also play a role in cup longevity and safety. Cups should be sterilized between cycles, usually by boiling them in water for a few minutes. Using mild, fragrance-free soap for routine cleaning between uses helps preserve material integrity and prevent irritation.

Risk assessment and prevention

While menstrual cup risks are generally low, certain factors increase complications. The most commonly reported issues include:

  • Discomfort due to improper sizing or incorrect insertion
  • Increased risk of infections from inadequate cleaning
  • Allergic reactions to specific cup materials (though rare)
  • Complications for individuals using intrauterine devices (IUDs)

Those with IUDs should consult a healthcare provider before using a menstrual cup. The suction created during removal may inadvertently dislodge the IUD, leading to unintended consequences. Proper removal techniques, such as breaking the seal before pulling out the cup, reduce this risk.

Another consideration is anatomical differences. Some individuals may find certain cup shapes or sizes more suitable than others. Factors like cervix height, pelvic floor strength, and flow levels all influence the ideal cup choice. Users experiencing persistent discomfort or leakage may need to experiment with different brands or styles to find the best fit.

Selection and fitting guidance

Choosing the right menstrual cup requires understanding personal anatomy and lifestyle needs. With various sizes, firmness levels, and designs available, selecting the most suitable cup is essential for both comfort and effectiveness. Cups generally come in small and large sizes, with recommendations based on age, childbirth history, and flow intensity.

Individuals with a high cervix may prefer longer cups, while those with a low cervix should opt for shorter models to prevent discomfort. Firmer cups provide stronger seals, making them ideal for those with active lifestyles or strong pelvic floor muscles. Softer cups, on the other hand, offer gentler flexibility and may be more comfortable for beginners.

Trial and error often play a role in finding the perfect fit. Many manufacturers provide sizing guides, but personal experience ultimately determines the best option. Some users may need to try multiple brands before settling on a cup that suits their needs.

Best practices for success

Proper technique and consistent hygiene practices ensure safe menstrual cup use. Mastering insertion and removal techniques significantly improves user experience while preventing complications. The most effective approach involves folding the cup into a smaller shape before inserting it, allowing it to open and create a secure seal once inside. Checking for proper positioning by gently rotating the cup helps confirm that it is fully expanded and leakproof.

Breaking the seal before removal is equally important. Simply pulling the cup out without releasing suction can cause discomfort and, in rare cases, impact pelvic floor health. Pressing the base of the cup to break the vacuum before removal makes the process easier and safer.

Cleaning routines should be followed diligently. Washing the cup with unscented soap and warm water during cycles prevents bacterial buildup. Between periods, sterilization using boiling water helps eliminate residual bacteria and maintain material quality.

Storage between cycles also requires attention. Keeping the cup in a breathable pouch rather than an airtight container prevents moisture buildup, which could encourage bacterial growth.

With proper knowledge and careful handling, menstrual cups remain a safe and sustainable alternative to traditional period products. By addressing common misconceptions and promoting best practices, users can maximize benefits while minimizing risks, ensuring a comfortable and worry-free menstrual experience.

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