What is Toxic Shock Syndrome, or TSS, is one of those phrases many of us have heard since our very first period. It is usually mentioned alongside tampons, often accompanied by warnings about changing them regularly. For many people, that warning creates a lasting fear: What happens if I leave my period product in too long? Can a menstrual cup cause TSS? Is a menstrual cup actually safer than a tampon? The good news is that TSS is extremely rare, but it is also a serious condition that is worth understanding rather than fearing. When it comes to menstrual care, knowing how TSS happens and how to use your period products correctly is one of the best ways to protect yourself.
What Exactly Is Toxic Shock Syndrome?
Toxic Shock Syndrome is a rare but potentially life-threatening illness caused by toxins produced by certain types of bacteria. The bacteria most commonly associated with TSS include Staphylococcus aureus and, less commonly, Group A Streptococcus. These bacteria can live harmlessly on or in the body without causing an infection. TSS can occur when certain strains produce toxins and those toxins enter the bloodstream or trigger an intense systemic immune response.
While TSS became particularly associated with tampon use in the late 1970s and early 1980s, menstrual TSS is not caused by tampons themselves. Rather, certain conditions can allow toxin-producing bacteria to multiply and create an environment where TSS can develop. Historical surveillance found that the vast majority of menstrual TSS cases for which a menstrual product was known involved tampon use, but TSS itself is not exclusively a tampon-related condition.
Most importantly, TSS is incredibly uncommon. Modern research continues to describe menstrual TSS as a rare condition, and the overall incidence is measured in only a small number of cases per 100,000 people.
Can a Menstrual Cup Cause TSS?
This is one of the biggest questions people have when considering switching from tampons to a menstrual cup.
The honest answer is that TSS is possible with a menstrual cup, but available research suggests that it is extremely rare. A large systematic review examining menstrual cup safety identified only a very small number of reported TSS cases among the studies and case reports reviewed. Overall, researchers concluded that menstrual cups are a safe menstrual management option, while also noting that additional high-quality research is needed.
That distinction matters. A menstrual cup should never be advertised as completely eliminating the risk of TSS because no internal menstrual product can make that promise. Instead, the goal is to understand the risk, follow proper hygiene and wear instructions, and recognize the symptoms that require immediate medical attention.
Why Does TSS Happen?
TSS requires more than simply having your period or using an internal menstrual product. Certain toxin-producing bacteria must be present, the conditions must allow those bacteria to produce toxins, and those toxins must trigger a serious systemic reaction.
Your vaginal environment is also naturally complex. Menstrual blood temporarily changes the vaginal environment during your period, while the presence, material, design and amount of time an internal product remains in place can influence the conditions inside the vagina.
This is why following the instructions for your menstrual product matters. Leaving any internal menstrual product in longer than recommended is never a good idea. Proper hand washing, cleaning, sanitizing and storage are equally important.
How Does Flow Fairy Fit Into TSS Prevention?
Flow Fairy was designed to make reusable menstrual care simple, comfortable and easy to maintain. The Flow Fairy menstrual cup is made from 100% medical-grade silicone and is designed to be emptied, washed and reused rather than continuously replacing disposable products.
Flow Fairy also provides up to 12 hours of protection, depending on your individual flow. That does not mean you should simply put your cup in and forget about it. Your cup should always be removed, emptied and cleaned according to the instructions, and you should never exceed the recommended maximum wear time.
One of the biggest advantages of a menstrual cup is that it collects menstrual fluid rather than absorbing it. Research examining menstrual cups has found no adverse effect on vaginal flora in several studies included in a systematic review, supporting the overall safety of menstrual cups as a period-care option.
However, we want to be completely transparent with you: Flow Fairy does not claim that a menstrual cup makes the risk of TSS zero, nor is there clinical evidence that allows us to give a specific percentage by which Flow Fairy prevents TSS. TSS remains extremely rare, but it is still possible. The safest approach is education, proper hygiene and following the recommended wear and care instructions.
Your Flow Fairy TSS-Safety Routine
Using your Flow Fairy menstrual cup correctly is simple. Always wash your hands thoroughly before inserting or removing your cup. During your period, empty your cup regularly and wash it thoroughly according to the care instructions provided with your Flow Fairy cup. At the end of your cycle, properly sanitize your cup before storing it in its breathable storage bag until your next period.
It is also important to pay attention to your body. If inserting or removing your cup causes significant discomfort, pain, unusual bleeding or irritation, stop using it and speak with a healthcare professional. You should also avoid using an internal menstrual product if you have an injury, sore or irritation that could be aggravated by insertion.
The FDA specifically recognizes that menstrual cups are worn inside the vagina and therefore recommends that manufacturers consider factors such as wear time, cleaning and reprocessing, materials, device design and potential effects on vaginal tissue and microbiota when assessing TSS risk.
Know the Warning Signs of TSS
TSS can develop suddenly, which is why knowing the symptoms is so important. Possible symptoms can include a sudden high fever, chills, muscle aches, dizziness or fainting, vomiting or diarrhea, a widespread rash that can resemble a sunburn, low blood pressure, confusion and severe muscle or abdominal pain.
If you experience sudden or severe symptoms while using a period cup or another internal period product, remove the product and seek urgent medical attention. Tell the healthcare professional that you are menstruating and that you have been using an internal menstrual product so they can properly evaluate your symptoms.
TSS is serious, but knowing the symptoms doesn’t mean you need to spend every period worrying about it. It means you are prepared.
The Bottom Line on Menstrual Cups and TSS
Toxic Shock Syndrome deserves to be taken seriously, but it does not need to be something you fear every time you get your period. TSS is rare, and research supports menstrual cups as a generally safe option for period management when they are used and cared for properly.
With Flow Fairy, you can make reusable period care part of your routine while keeping safety at the forefront. Wash your hands, follow the recommended wear time, clean your cup properly, pay attention to your body and know the warning signs.
Your period shouldn’t come with unnecessary fear. It should come with confidence, education and products that make taking care of yourself easier.
Cited Sources
- U.S. Food & Drug Administration, Menstrual Product Options, Facts, and Safe Use:
FDA: Menstrual Product Options, Facts, and Safe Use - van Eijk et al., Menstrual cup use, leakage, acceptability, safety, and availability: a systematic review and meta-analysis, The Lancet Public Health:
PubMed: Menstrual Cup Systematic Review and Meta-Analysis - Schlievert et al., research and surveillance literature concerning menstrual toxic shock syndrome and Staphylococcus aureus:
CDC: Toxic Shock Syndrome Surveillance Update - U.S. Food & Drug Administration, Menstrual Products – Performance Testing and Labeling Recommendations:
FDA: Menstrual Products Performance Testing and Labeling Recommendations - Menstrual cup safety systematic review:
PubMed: Acceptability and Safety of the Menstrual Cup - Population-based study of toxic shock syndrome incidence:
PubMed: Staphylococcal Toxic Shock Syndrome 2000–2006
