Toxic shock syndrome (TSS) is extremely rare. In the United States, the overall incidence is estimated at 0.8 to 3.4 cases per 100,000 people per year, and some recent studies put the figure even lower, between 0.03 and 0.07 per 100,000. To put that in perspective, you’d expect roughly 1 case for every 1 to 3 million people in a given year by the most conservative estimates.
How Rates Have Changed Since the 1980s
TSS became a household term in the early 1980s, when a surge of cases was linked to a specific brand of super-absorbent tampons. At its peak, the rate among women aged 12 to 49 reached 6 to 12 per 100,000. Once those products were pulled from shelves and tampon manufacturing standards changed, rates dropped sharply. By 1986 the national rate for all ages had fallen to about 1.0 per 100,000, and by 1996 it was 0.5 per 100,000.
Since then, the numbers have plateaued. Surveillance data from Minnesota and Colorado found average rates of 0.5 to 0.6 per 100,000 that held steady from the mid-1990s through the mid-2000s. A CDC analysis covering 2006 to 2018 confirmed that hospitalization rates among people under 21 remained low at 0.6 to 1.4 per 100,000, with no upward trend. In short, TSS has been rare and stable for roughly three decades.
Two Types of TSS
TSS is caused by toxins released by two different families of bacteria, and the distinction matters because the two types behave differently.
Staphylococcal TSS is the type most people think of. It’s linked to Staph aureus bacteria and is the form historically associated with tampon use, though it also occurs after surgical wounds, skin infections, burns, and nasal packing. This is the rarest form, with recent estimates of 0.03 to 0.07 cases per 100,000 per year.
Streptococcal TSS is caused by the same family of bacteria responsible for strep throat. It tends to develop as a complication of severe strep infections. About 8 to 22% of people with an invasive Strep pyogenes infection go on to develop streptococcal TSS, and the rate climbs to 40 to 50% among those with necrotizing soft tissue infections. While still uncommon overall, streptococcal TSS is the more dangerous of the two when it does occur.
Who Gets TSS
The popular image of TSS as something that only happens to young women using tampons is outdated. TSS can occur in anyone of any age, race, or sex. A review of 130 non-menstrual cases found the syndrome across a wide range of settings: skin infections, surgical wounds, postpartum complications, deep abscesses, inflamed joints, and even bloodstream infections with no obvious source.
That said, menstruating people who use tampons or menstrual cups do carry a specific, if very small, risk. The mechanism involves bacteria growing in the warm, protein-rich environment created by an internal menstrual product. Changing tampons regularly (at least every four to eight hours) and alternating with pads reduces this already tiny risk further.
Among young people under 21, hospitalization rates between 2006 and 2018 remained between 0.6 and 1.4 per 100,000, far below the peaks seen in the early 1980s. The incidence does tend to be slightly higher in the winter months and is more prevalent in developing countries, likely reflecting differences in healthcare access and wound care.
Why It’s Serious Despite Being Rare
The reason TSS gets so much attention relative to its rarity is its speed and severity. TSS is not a localized infection. The bacteria don’t need to spread through the bloodstream themselves. Instead, they release toxins that trigger a bodywide inflammatory response, causing a sudden high fever, a dramatic drop in blood pressure, a sunburn-like rash, and potentially organ failure, sometimes within 24 to 48 hours.
Streptococcal TSS carries a particularly high fatality rate compared to the staphylococcal form, which is one reason emergency physicians treat suspected cases aggressively even before lab results confirm the diagnosis. Early recognition and hospital treatment are the main factors that determine outcome.
Warning Signs Worth Knowing
Because TSS escalates quickly, knowing the early symptoms matters more than the statistics. The classic pattern includes a sudden fever of 102°F (39°C) or higher, a flat red rash that can resemble a sunburn (especially on the palms and soles), vomiting or diarrhea, muscle aches, dizziness or fainting from low blood pressure, and confusion. These symptoms appearing together, especially during a menstrual period or within days of a wound or surgery, warrant immediate emergency care.
One distinctive feature: in staphylococcal TSS, the skin on the hands and feet often peels in sheets one to two weeks after the illness begins. This peeling is a late sign and helps confirm the diagnosis retrospectively, but it isn’t useful for early detection.
Putting the Risk in Context
At a rate of roughly 0.5 to 1.0 per 100,000 across the general population, TSS is less common than being struck by lightning over a lifetime (estimated at about 1 in 15,300 over 80 years). The odds of any individual developing TSS in a given year are vanishingly small. The condition deserves respect because of how quickly it can become life-threatening, not because it’s likely to happen. Knowing the symptoms and acting fast if they appear is the most practical thing you can do with that knowledge.