It may seem like a basic hygiene habit, but many people quietly skip changing their underwear daily. Health experts warn that wearing the same pair for too long isn’t just unhygienic—it can pose real health risks, making daily changes essential.
Alarming Study Findings
A 2021 study found that the average pair of underwear contains approximately 0.1 grams of fecal matter. This means that wearing underwear for more than a day isn’t merely uncomfortable or unclean—it can have real health implications.
Dirty Drawers
Despite standard hygiene recommendations, many young adults aren’t changing underwear daily. A 2023 Newsweek poll revealed that 36% of Gen Z respondents (ages 18–24) wear the same pair for longer than 24 hours, with another 14% admitting it’s a regular habit. In total, half of Gen Z reported going a full day or more without switching to clean underwear.
This trend isn’t limited to younger adults. Among millennials (ages 25–34), 24% said they routinely re-wear underwear. In contrast, older adults reported significantly cleaner habits—67% of people aged 55–64 said they never wear underwear for more than one day, and only 3% admitted to repeating pairs.
Skin Irritation and Infection
Doctors warn that stretching wear-time can cause more than just discomfort. Bacteria, yeast, and moisture build up in tight-fitting clothing, creating an environment conducive to skin irritation and infection, especially in areas with limited airflow.
“Men and women risk skin irritation, rashes, or the worsening of pre-existing conditions such as eczema or psoriasis when they re-wear underwear too often without washing it,” explained Sarah Roberts, a licensed skincare specialist.
Risks for Women
Wearing underwear too long can lead to infections like yeast overgrowth and bacterial vaginosis. Yeast infections cause itching, burning, and thick white discharge, while bacterial vaginosis may include a fishy odor and gray or yellow discharge due to bacterial imbalance.
“The vulva contains folds and crevices that harbor moisture and bacteria more readily than male genitalia,” noted Dr. Archit Aggarwal, a dermatologist.
Risks for Men
Men are also at risk, particularly for fungal infections like jock itch, characterized by an itchy, red rash in the groin, buttocks, and upper thighs. Even looser garments, such as boxers, don’t prevent these hazards if underwear is worn repeatedly without change.
The Bottom Line: Change Daily
While some may stretch a pair of briefs for a second day in a pinch, doctors strongly recommend changing underwear at least once every 24 hours. This advice is even more critical in high-sweat situations.
“For those engaged in intense physical activity or living in hot, humid climates, it may be necessary to change underwear more than once a day to maintain proper hygiene,” said Dr. Hannah Kopelman, a dermatologist.
Dr. Aggarwal added, “If you notice any discomfort, itching, or unusual discharge, change your underwear immediately and consult a healthcare professional if necessary.”
How often do you change your underwear? Share your hygiene habits and pass this article along to help others understand the importance of daily changes.
