Why do my period pants smell after washing?

Common Causes & How to Keep Your Period Underwear Fresh

Period underwear is designed to be reusable, eco-friendly, and comfortable—but sometimes, even after washing, you might notice an unpleasant smell. Why does this happen, and how can you prevent it?

🔍 Common Reasons for Smelly Period Pants After Washing

1. Not Rinsing Soon Enough After Use

Menstrual blood contains proteins and iron that can cause odors if left sitting in fabric too long.
Tip: Rinse your period underwear in cold water immediately after wearing to reduce stains and odor buildup.

2. Washing at Too Low a Temperature

Cold water washes are gentler but may not always fully break down oils and bacteria that cause smells.
Tip: Occasionally wash at 30–40°C with a gentle detergent to deep clean.

3. Using Harsh Detergents or Fabric Softeners

Detergents with fragrances or fabric softeners can leave residues that trap odors and clog the absorbent layers.
Tip: Use fragrance-free, gentle detergents and avoid fabric softeners to keep fabrics breathable.

4. Not Drying Properly

Leaving damp underwear in a laundry basket or dryer can promote bacterial growth and cause musty smells.
Tip: Always air dry your period pants in a well-ventilated area, avoiding plastic bags or humid spaces.

5. Overusing Period Pants Without Enough Washing

Wearing the same pair multiple times between washes or storing damp underwear too long can cause odor buildup.
Tip: Rotate several pairs and wash after every use. Store damp underwear in a breathable wet bag.

🧼 How to Fix Smelly Period Underwear

  • Pre-soak in cold water with baking soda or white vinegar for 30 minutes before washing to neutralize odors.

  • Use a mild detergent designed for sensitive skin and odor removal.

  • Wash on a gentle cycle at warm temperature (30–40°C) occasionally.

  • Air dry thoroughly in sunlight if possible (sunlight helps kill bacteria and freshen fabrics).

💡 Pro Tip from NYX Collection

NYX’s period underwear comes with antimicrobial layers that help reduce odors, but they still require proper care:
Rinse immediately, wash gently, and air dry to keep them fresh.

Explore their collection here: NYX Period Underwear

✅ In Summary

If your period pants smell after washing, it’s usually due to incomplete rinsing, low washing temperature, detergent residue, improper drying, or overuse.
Following good care habits will keep your underwear fresh, odor-free, and comfortable cycle after cycle.

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