Toxic Shock Syndrome: Symptoms, Causes and Prevention

Toxic shock syndrome is a rare but life-threatening illness, and if you use tampons, you have probably seen the warning printed inside the box and wondered exactly how worried you should be. The honest answer: the risk is small, but the condition is serious enough that every person who menstruates should know the warning signs cold. Toxic shock syndrome (often shortened to TSS) is caused by toxins released by certain bacteria, most often Staphylococcus aureus and sometimes group A Streptococcus. It can move from feeling a bit off to a medical emergency within hours. This page is a plain-English, evidence-led guide to what TSS is, what causes it, the symptoms to watch for, who is at higher risk, and the practical steps that lower your chances. It is educational and not a diagnosis. If you think you have TSS right now, skip to the emergency section below and seek care immediately.

I have written about menstrual hygiene for years and tested a lot of period products. I want to be careful here, because fear does not help anyone. TSS is uncommon. But it is also the reason tampon absorbency became regulated in the first place, and understanding it makes every other choice you make (absorbency, how long you leave a tampon in, whether you alternate with pads) make sense.

When to seek emergency care

Toxic shock syndrome is a medical emergency. If you are using a tampon, menstrual cup, or contraceptive device and you suddenly develop a high fever with vomiting, diarrhea, a sunburn-like rash, dizziness, or confusion, do the following without waiting to see if it passes:

1. Remove the tampon (or menstrual cup) right away.
2. Get emergency medical care now. In the United States call 911 or go to the nearest emergency room; the NHS in the UK advises calling 999 for severe or fast-worsening symptoms.
3. Tell the clinician you were using a tampon or menstrual product and that you are worried about toxic shock syndrome. That single sentence helps them act fast.

TSS can progress rapidly to shock and organ failure, so early treatment matters enormously. Do not wait for symptoms to declare themselves. This is one of the few situations in menstrual health where hours count.

What is toxic shock syndrome?

Toxic shock syndrome is a rare, severe illness caused by toxins that certain bacteria release into the body. It is not an infection in the ordinary sense of a wound turning red. Instead, bacteria that are often already living harmlessly on the skin or in the nose, throat, or vagina begin producing toxins that flood the bloodstream and trigger a massive, body-wide immune reaction.

Two bacteria cause most cases, according to Mayo Clinic and the clinical literature summarized in StatPearls:

• Staphylococcus aureus (staph), which produces a toxin called TSST-1 (toxic shock syndrome toxin-1). This is the type most associated with tampon use.
• Streptococcus pyogenes (group A strep), which causes streptococcal TSS, more often linked to skin and soft-tissue infections than to periods.

These toxins act as superantigens. In plain terms, a superantigen hijacks the immune system, switching on a huge number of immune cells at once. That overreaction, described in StatPearls, floods the body with inflammatory signaling molecules (cytokines), which causes blood vessels to leak, blood pressure to fall, and organs to struggle. That cascade is why TSS can escalate so quickly.

TSS is not only a tampon problem

This is the part most people miss. Toxic shock syndrome affects men, children, and people who have never used a tampon. Historically it became famous because of tampons, but the Cleveland Clinic notes it can follow surgery, childbirth, burns, cuts, boils, insect bites, and nasal packing used to stop nosebleeds. Roughly half of staphylococcal TSS cases today are non-menstrual. So while this article focuses on period-related risk, TSS is fundamentally about bacteria and toxins finding a foothold, not about tampons specifically.

Toxic shock syndrome symptoms

The hallmark of TSS is that symptoms come on suddenly and get worse fast. You will not feel gradually run-down over a week. It tends to arrive like a switch flipping. Based on Mayo Clinic, the Cleveland Clinic, and the CDC case definition, watch for these signs:

• A sudden high fever, often 102 degrees F (about 38.9 degrees C) or higher, sometimes with chills and body aches.
• Low blood pressure (hypotension), which can cause dizziness, lightheadedness, or fainting. In the CDC clinical criteria, this means a systolic blood pressure at or below 90 mm Hg in adults.
• A rash that looks like a sunburn, often across large areas of the body, and characteristically on the palms of the hands and soles of the feet.
• Vomiting or diarrhea, especially at the very start of the illness.
• Muscle aches that feel severe and out of proportion.
• Redness of the eyes, mouth, and throat.
• Confusion, disorientation, or drowsiness, which signals the illness is affecting the whole body.
• Headache and, in severe cases, seizures.

A later sign, appearing about 1 to 2 weeks after the rash per the CDC case definition, is peeling of the skin (desquamation), particularly on the palms and soles. That is a diagnostic marker doctors look for, not something you should wait to see. If several of the sudden symptoms above appear together while you are menstruating, treat it as an emergency.

Why TSS progresses so fast

The speed is not bad luck; it is built into the biology. Because the toxins act as superantigens, the immune overreaction and the drop in blood pressure can happen within a day or two of symptoms starting. What begins as flu-like signs can move to shock and organ stress quickly. That is exactly why the advice is to act on suspicion rather than waiting for certainty.

What causes tampon-related toxic shock syndrome?

Tampons do not contain the bacteria that cause TSS, and a tampon by itself is not dangerous. The concern is the environment a tampon can create. A very absorbent tampon left in place for a long time can dry the vaginal tissue and, in some cases, cause tiny abrasions during insertion or removal. That combination (a warm, oxygenated, blood-rich space plus a possible break in the tissue) can let Staphylococcus aureus that is already present multiply and produce toxin.

This link is not theoretical. In the late 1970s and 1980, a sharp rise in menstrual TSS was traced to a super-absorbent tampon called Rely, made by Procter and Gamble. As documented by McGill University’s Office for Science and Society and CDC surveillance, the product was pulled from the market in 1980, and cases fell dramatically afterward. That episode is the reason the U.S. Food and Drug Administration later standardized tampon absorbency labeling so that “regular” and “super” mean the same thing across every brand.

FDA standardized absorbency ranges

Because higher absorbency correlates with higher TSS risk, the FDA requires tampons to be labeled by a standardized absorbency range measured in grams of fluid. Knowing these numbers helps you choose the lowest absorbency that actually manages your flow.

Absorbency label	Fluid absorbed (grams)
Light	Less than 6 g
Regular	6 to 9 g
Super	9 to 12 g
Super Plus	12 to 15 g
Ultra	15 to 18 g

These ranges come from the FDA tampon regulations (21 CFR 801.430) and consumer guidance. The practical takeaway from the FDA and CDC is consistent: use the lowest absorbency that handles your flow, not the highest just in case. If you are curious how these grams translate into real coverage, our guide to how much blood a tampon holds walks through the FDA chart and what each level looks like in practice.

Risk factors for toxic shock syndrome

Anyone can get TSS, but certain situations raise the odds. According to Mayo Clinic and the Cleveland Clinic, the main risk factors include:

• Using high-absorbency tampons, especially higher absorbency than your flow needs.
• Leaving a tampon in too long, or forgetting one is in place.
• Menstrual cups, diaphragms, cervical caps, and contraceptive sponges, which can also create the conditions for toxin production if left in too long or inserted with unwashed hands.
• Skin wounds: cuts, burns, surgical incisions, boils, and even insect bites.
• Recent surgery or childbirth, including the postpartum period.
• Nasal packing used to control nosebleeds.
• A previous episode of TSS, which raises the risk of it happening again.

On menstrual cups specifically: the risk is very low. Cups are made of non-absorbent medical-grade silicone, which is a less friendly environment for bacteria than an absorbent tampon, and documented cup-associated TSS cases are extremely rare (a handful in the medical literature, such as the case reported in this NIH-indexed report). In those rare cases, factors like a small scrape during insertion or inadequate cleaning were involved. If you are weighing your options, our menstrual cup vs tampon comparison covers the safety and practical trade-offs in more detail.

How common is toxic shock syndrome?

Very uncommon. Menstrual TSS incidence is generally estimated at well under 1 case per 100,000 menstruating people per year, with published figures often cited around 0.3 to 0.5 per 100,000, and the highest rates in people aged roughly 13 to 24. Overall TSS (menstrual plus non-menstrual) is estimated at around 0.8 to 3.4 per 100,000 in the United States, according to StatPearls.

Mortality varies by the bacteria involved. Staphylococcal TSS (the usual menstrual type) has a relatively low fatality rate, historically around 5 percent and under 3 percent today. Streptococcal TSS is more dangerous and can carry a mortality rate that may exceed 50 percent, per the clinical literature in StatPearls. These numbers are context, not a reason to panic: for the average tampon user practicing good habits, TSS is a rare event. The point of knowing the statistics is to take prevention seriously without living in fear.

How to prevent toxic shock syndrome with tampons

Prevention is straightforward and backed by the FDA, CDC, NHS, and ACOG. None of it requires giving up tampons.

1. Use the lowest absorbency that manages your flow. If a regular tampon lasts several hours and comes out only lightly soaked, you do not need super. Match absorbency to flow, and step up only on your heaviest days.
2. Change your tampon every 4 to 8 hours. This is the shared recommendation of the FDA and ACOG. Never wear a single tampon for more than 8 hours. For a fuller breakdown of timing by flow, see our guide on how often to change a tampon.
3. Alternate tampons with pads. Using pads overnight or on lighter days, and switching between products, gives the vaginal tissue a break. If you are comparing formats, our tampons vs pads guide lays out when each makes sense.
4. Wash your hands before and after insertion or removal. Clean hands lower the chance of introducing bacteria.
5. Never use two tampons at once, and never use a tampon to manage non-menstrual discharge.
6. Change to a fresh tampon when you wake up if you wore one overnight, and never leave one in just for now.
7. If you use a menstrual cup, diaphragm, or cervical cap, follow the manufacturer’s cleaning and wear-time instructions exactly, empty and rinse a cup every 4 to 8 hours, and sterilize it between periods (boiling for a few minutes is the common method).

A quick note on products, since readers often ask: any FDA-cleared tampon from a reputable brand is designed to the same standardized absorbency ranges, so brand loyalty matters less than choosing the right absorbency. If you find you consistently need very high absorbency, that is worth a conversation with your clinician, and you might explore pads designed for heavy flow as a rotation option. Keeping a small stash of lower-absorbency tampons and pads on hand makes it easier to match your product to the day rather than reaching for super out of habit.

What to do if you suspect toxic shock syndrome

To restate the most important part of this page, because it is the part that saves lives:

• Remove the tampon or cup immediately.
• Seek emergency care right away (call 911 in the US, 999 in the UK, or go to the nearest emergency department).
• Say the words: I was using a tampon and I think this could be toxic shock syndrome.
• Do not try to wait it out or self-treat. TSS is treated in a hospital with intravenous fluids, medicines to support blood pressure, antibiotics, and removal of the source of infection.

If you have had TSS before, tell your doctor, because a prior episode raises your risk and many clinicians advise avoiding tampons afterward.

The bottom line

Toxic shock syndrome is rare, but it is real, it moves fast, and it is worth respecting. The good news is that the same simple habits that make tampons more comfortable (lower absorbency, changing every 4 to 8 hours, alternating with pads, and clean hands) are exactly what lowers your risk. Learn the symptoms, keep the emergency steps in mind, and use tampons the way they were designed to be used.

This article is for general education and is not a substitute for professional medical advice, diagnosis, or treatment. If you have specific concerns about your risk of toxic shock syndrome, or if you develop the symptoms described here, contact a healthcare professional or emergency services. For more evidence-led guidance on periods and products, explore our menstrual hygiene hub or start at the Sanitation Towel homepage.

Frequently asked questions

What are the first signs of toxic shock syndrome?

The first signs of toxic shock syndrome usually come on suddenly and include a high fever (often 102 degrees F or higher), vomiting or diarrhea, a sunburn-like rash, dizziness or low blood pressure, and muscle aches. Confusion can follow quickly. Because these symptoms escalate fast, you should remove any tampon and seek emergency care right away if they appear during your period.

Can you get toxic shock syndrome without using tampons?

Yes. Toxic shock syndrome is caused by toxins from Staphylococcus aureus or group A Streptococcus bacteria, and it can affect men, children, and people who have never used a tampon. Non-menstrual cases can follow surgery, childbirth, burns, cuts, boils, and nasal packing. Today roughly half of staphylococcal TSS cases are unrelated to menstruation.

How long can you leave a tampon in without risking TSS?

The FDA and ACOG advise changing your tampon every 4 to 8 hours and never wearing a single tampon for more than 8 hours. Leaving a tampon in longer, especially a high-absorbency one, raises the risk of toxic shock syndrome. Using the lowest absorbency that manages your flow and alternating with pads further lowers the risk.

How common is toxic shock syndrome from tampons?

Menstrual toxic shock syndrome is rare, with published incidence often estimated at well under 1 case per 100,000 menstruating people per year, commonly around 0.3 to 0.5 per 100,000. The highest rates are in people roughly 13 to 24 years old. While rare, TSS is serious enough that knowing the symptoms and prevention steps matters for anyone who uses tampons.

Can you get toxic shock syndrome from a menstrual cup?

It is possible but extremely rare. Menstrual cups are made of non-absorbent medical-grade silicone, which is a less friendly environment for TSS-causing bacteria than an absorbent tampon, and only a handful of cup-associated cases appear in the medical literature. To stay safe, wash your hands before handling the cup, empty and rinse it every 4 to 8 hours, and sterilize it between periods.

What should I do if I think I have toxic shock syndrome?

Remove the tampon or menstrual cup immediately and seek emergency care without delay by calling 911 in the US (or 999 in the UK) or going to the nearest emergency room. Tell the clinician you were using a tampon and that you are worried about toxic shock syndrome, because early treatment is critical. TSS is treated in a hospital with intravenous fluids, blood-pressure support, and antibiotics; do not try to wait it out.