Do you need to throw out your underwear every 6-9 months

A viral TikTok video suggests that people should trash their underwear after a certain time period.
A viral TikTok claims you should throw out your underwear every six to nine months. Here's what ob-gyns have to say about this supposed rule.

How often should you change your underwear? Experts react to 9-month rule - NZ Herald

Do you need to throw out your underwear every 6-9 months

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This is how often you should throw out your underwear.

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How often should you replace your underwear?

Do you really need to change your underwear every six months?