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Published on: 7/21/2026

Can forgotten tampons or menstrual cups cause infections or other problems?

Yoshinori Abe

Reviewed by Yoshinori Abe, MD

Internal Medicine

Leaving a tampon or menstrual cup in too long can cause serious infections, including Toxic Shock Syndrome (TSS), a rare but life-threatening condition. TSS is triggered by bacterial toxins and can escalate quickly, causing fever, rash, low blood pressure, and organ complications if untreated.

If you suspect a forgotten tampon or cup, remove it as soon as possible and monitor for symptoms like fever, dizziness, vomiting, or flu-like feelings. Prompt medical attention is critical if symptoms appear.

Not sure whether what you're experiencing is serious? Take a free, instant, online symptom check to better understand your symptoms and get personalized guidance on your next steps. It only takes a few minutes, requires no signup, and can help you decide whether to see a doctor now or monitor at home—giving you clarity and peace of mind when it matters most.

Reviewed for medical accuracy: 07/20/2026

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Explanation

Forgetting tampons or menstrual cups inside the body can cause infections, including a serious condition called Toxic Shock Syndrome (TSS). TSS is linked to certain bacteria and can be very dangerous.

What is Toxic Shock Syndrome?

  • TSS is a rare but severe condition caused by toxins from bacteria.
  • It can happen when tampons or menstrual cups are left in for too long.

Symptoms of TSS

  • High fever
  • Rash
  • Low blood pressure
  • Fatigue and confusion

Prevention Tips

  • Change tampons and menstrual cups regularly.
  • Follow the instructions for use carefully.

If you're experiencing any unusual symptoms, you can use our free symptom checker to help assess your condition, but it's important to seek medical help immediately if you suspect TSS. Remember, taking simple precautions can help prevent these issues.

(References)

  • Marton M. (2016). Staphylococcal Toxic Shock Syndrome Caused by an .... The Journal of Critical Care Medicine, 5939143.

  • Mitchell MA, Bisch S, Arntfield S, & Hosseini-Moghaddam SM. (2015). A confirmed case of toxic shock syndrome associated with the .... The Canadian Journal of Infectious Diseases & Medical Microbiology, 4556184.

  • Hadjilouca C, Efseviou C, Kastoris A, & Vavlitou A. (2025). An Unexpected Cause of Fever After Weaning From Veno .... Cureus, 12079146.

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