When to Change Underwear?

"From a health perspective, there is no need to throw out your underwear every six to nine months, provided you're wearing a fresh pair every day and you're washing them in a hot water wash after every wear," Dr Shreya Andric, a Sydney-based specialist dermatologist, told news.com.au.

How often should a woman change her underwear?

Up to twice daily is ideal if you live an active life, and once is a must to simply decrease the risk of infection, particularly yeast infections. "Less frequent changes can lead to build up of moisture that predisposes women to developing yeast and skin irritation," says Dr. Nazem.

How often are you supposed to change your underwear?

So, as it turns out, underwear are not like toothbrushes, and don't need to be replaced cyclically for bacterial reasons. As long as you're donning a fresh pair every day, and washing them after every use, you can wear them until they're old and dingy looking.