Can leaving a tampon in too long cause a fishy smell?

Can a Forgotten Tampon Cause a Fishy Smell?

Yes, leaving a tampon in for too long can lead to a noticeable, unpleasant odor—often described as fishy or musty. This happens because tampons, when left in too long, create an environment where bacteria can thrive. The general recommendation is not to wear a tampon for more than four to eight hours. Going beyond that increases the risk of bacterial growth, which can alter your vaginal pH and lead to odor.

While a mild scent is normal during menstruation, a strong, foul smell is worth paying attention to. It could be a sign that a tampon was accidentally left behind—something that’s more common than many realize. A forgotten tampon can start to break down, allowing bacteria like Gardnerella, associated with bacterial vaginosis, to multiply. This not only causes odor but may also lead to irritation, discharge, or even more serious infections if not addressed.

If you suspect you’ve left a tampon in too long—or simply notice a persistent bad smell—check to make sure you’re not wearing one. If you can’t remove it yourself or experience fever, pain, or unusual discharge, it’s best to see a healthcare provider quickly. In rare cases, prolonged tampon use can lead to toxic shock syndrome (TSS), a rare but serious condition linked to certain bacteria.

The good news? Prevention is simple. Change your tampon regularly, consider using lower absorbency options, and never leave one in overnight (opt for pads instead). Listening to your body and staying mindful of timing can keep you feeling fresh and healthy throughout your cycle.