Underwear hygiene is a basic but often overlooked part of personal health. Doctors, including gynecologists, dermatologists, and urologists, agree on one key rule: Change your underwear every day.
This prevents buildup of sweat, bacteria, oils, and discharge that can lead to irritation, infections, odors, or skin issues.
The Golden Rule: Once a Day Minimum
Health experts like dermatologist Marisa Garshick, MD, and gynecologists emphasize fresh underwear daily. “In general, it is recommended to change your underwear daily to prevent the buildup of dirt, sweat, bacteria, and oil,” says Dr. Garshick. Skipping this can create a breeding ground for yeast, fungi, and bacteria—potentially causing infections like bacterial vaginosis, yeast infections, or jock itch.
When to Change More Often
- After workouts or sweating — Moisture promotes bacterial growth.
- During menstruation — Change with pads/tampons for freshness.
- In hot/humid weather — Sweat accumulates faster.
- If you notice odor, discharge, or discomfort — Switch immediately.
OB/GYNs recommend up to twice a day for active lifestyles or heavy discharge to minimize infection risk.
Bonus Tip: When to Replace Underwear Entirely
No strict expiration, but refresh your collection every 6–12 months or when elastic loosens, fabric thins, or stains persist. Breathable cotton is best for daily wear.
Daily changes keep things fresh and healthy—it’s a simple habit with big benefits!