Leaving a tampon in too long can cause a range of problems, from a foul-smelling discharge to, in rare cases, a life-threatening condition called toxic shock syndrome (TSS). The FDA recommends changing your tampon every 4 to 8 hours and never wearing one for more than 8 hours at a time. Here’s what actually happens inside your body when you exceed that window, what symptoms to watch for, and what to do if you realize a tampon has been left in.
Why the 8-Hour Limit Exists
Your vagina naturally hosts bacteria. A tampon that stays in place too long creates a warm, moist environment where those bacteria can multiply rapidly. As the tampon absorbs menstrual blood and expands, it can also cause micro-abrasions in the vaginal walls, giving bacteria a potential entry point into the bloodstream.
The FDA’s guidance is clear: change your tampon every 4 to 8 hours, and never leave a single tampon in for more than 8 hours. This isn’t an arbitrary number. Higher-absorbency tampons, which stay in longer because they take more time to saturate, have been consistently linked to greater TSS risk. The FDA now requires standardized absorbency labeling on tampon boxes, and current products range from 6 to 15 grams of absorbency. Using the lowest absorbency that works for your flow is one of the simplest ways to reduce your risk.
Infection and Discharge
TSS gets the most attention, but the far more common consequence of a forgotten tampon is a localized infection. When a tampon stays in for days (which happens more often than people admit, especially at the end of a period when flow is light and the tampon is easy to forget), the bacterial overgrowth typically announces itself through unmistakable symptoms:
- Foul-smelling discharge that may be brown, green, yellow, pink, or gray
- Itching inside the vagina or on the vulva
- Uncomfortable or painful urination
- Pelvic or abdominal pain
- Swelling in or around the vagina
- Rash or redness around the genitals
The smell is usually the first and most obvious sign. Many people describe it as overwhelmingly unpleasant, unlike normal menstrual odor. If you notice a sudden, strong vaginal odor and can’t explain it, a retained tampon is worth considering, especially if you were recently on your period.
Toxic Shock Syndrome: Rare but Serious
TSS is caused by toxins produced by certain strains of Staphylococcus aureus bacteria. These toxins can enter the bloodstream and cause organ damage to the kidneys, heart, and liver, and in the most severe cases, death. The condition affects roughly 1 to 2 out of every 100,000 young women per year, translating to an estimated 1,000 cases annually in the United States. It’s rare, but it escalates fast.
The link between tampons and TSS became widely known in 1980, when a specific brand called Rely was found to carry substantially higher risk. Those tampons were made with polyester foam and a synthetic material no longer used in any product. After Rely was pulled from the market and tampon absorbencies dropped across the industry, TSS rates fell dramatically. Today’s tampons are made from cotton, rayon, or a blend of both.
Still, the risk hasn’t disappeared entirely. Higher absorbency remains a factor, though researchers note the exact mechanism is still not fully understood. What is clear: the longer a tampon stays in and the more absorbent it is, the more opportunity bacteria have to produce dangerous toxins.
Warning Signs of TSS
TSS symptoms come on suddenly, often within hours. That speed is what makes it dangerous. Key warning signs include:
- High fever above 102°F (38.9°C), appearing rapidly
- A flat, red rash covering large areas of the body, sometimes resembling a sunburn, particularly on the palms and soles of the feet
- Low blood pressure, which can cause dizziness, fainting, or confusion
- Vomiting or diarrhea
- Muscle aches
If you have a tampon in (or recently had one in) and develop a sudden high fever with any combination of these symptoms, this is a medical emergency. TSS can progress to organ failure within hours, and early treatment dramatically improves outcomes.
How to Remove a Stuck or Forgotten Tampon
A tampon can’t get “lost” inside you. The cervix at the top of the vaginal canal is too narrow for a tampon to pass through. But a tampon can migrate higher up, especially if it’s been in for a while, making it hard to reach with your fingers.
To remove it yourself, wash your hands first. Squat down and bear down as if you’re having a bowel movement. This pushes the tampon lower in the vaginal canal. Insert one finger and make slow, circular movements to locate the tampon. If one finger isn’t enough, try using two fingers to grip and gently pull it out. Never try to fish it out with tweezers, a pen, or any other object, as this can injure the vaginal walls and introduce new bacteria.
If you can feel the tampon but can’t get a grip on it, or if you’re not sure whether one is in there at all, a doctor or nurse can remove it quickly. This is a routine procedure in clinics and emergency departments, and there’s no reason to feel embarrassed. Healthcare providers handle retained tampons regularly.
After Removal: What to Expect
Once a forgotten tampon is out, the strong odor typically resolves within a day or two as the vaginal environment rebalances. If you had mild symptoms like discharge or irritation, those usually clear up on their own in the same timeframe.
If symptoms persist for more than 48 hours after removal, or if you develop a fever above 104°F (40°C), pelvic pain, or worsening discharge, that suggests an infection that may need treatment. The body is generally good at recovering from a brief bacterial disruption, but a tampon left in for several days can sometimes cause an infection that needs medical attention to fully resolve.
Reducing Your Risk
The practical steps are straightforward. Use the lowest absorbency tampon that handles your flow. Set a phone alarm if you tend to forget. Alternate with pads or a menstrual cup, especially overnight or on light-flow days when it’s easiest to forget a tampon is in. Some people find it helpful to always remove a tampon before bed and switch to a pad for sleeping, since sleep can easily push you past the 8-hour mark.
If you’re using tampons only during the day and changing them every 4 to 6 hours, your risk of any complication is very low. The problems arise when a tampon is forgotten entirely, often at the tail end of a period when the flow is light enough that you stop thinking about it.