Why do my period undies smell weird?

Period underwear is designed to keep you feeling fresh and comfortable during your cycle, but sometimes, you might notice a strange or unpleasant odor. If you’re wondering why your period undies smell weird, you’re not alone. Let’s explore the common reasons behind this and what you can do about it.

1. Incomplete Washing or Residue Build-Up

One of the most common reasons for odor is detergent residue or sweat buildup trapped in the fabric layers.

  • Using too much detergent or fabric softener can leave residues.

  • Not rinsing thoroughly can trap bacteria and odors.

  • Fabric softeners and bleach can coat the absorbent layers, reducing their ability to dry properly.

Solution: Use mild, fragrance-free detergents and avoid fabric softeners. Rinse period underwear thoroughly and wash them separately or in a laundry bag.

2. Wearing Period Undies Too Long

Wearing period underwear beyond its absorbency capacity or for extended hours can cause moisture and bacteria buildup, leading to odors.

  • Most period undies are best changed every 8-12 hours.

  • Wearing them longer when fully saturated can trap bacteria and cause smells.

Solution: Change your period underwear regularly, especially on heavy flow days.

3. Not Rinsing Immediately After Use

Blood and sweat left sitting in the fabric can start to smell if not rinsed promptly.

  • Blood is a protein-rich stain that can harbor bacteria.

  • Delayed rinsing can make odors harder to remove later.

Solution: Rinse your period underwear in cold water as soon as possible after wearing.

4. Insufficient Drying

Drying period underwear in damp or poorly ventilated areas can cause mildew and musty odors.

  • Air dry in a well-ventilated, shaded area.

  • Avoid tumble drying as heat can damage waterproof membranes.

Solution: Make sure underwear is completely dry before storing.

5. Bacterial or Yeast Infections

If odors persist despite proper care, it might be related to infections which can cause strong or unusual smells.

  • Consult a healthcare professional if you suspect infection.

  • Maintain good hygiene and change underwear regularly.

How to Prevent Weird Smells in Period Underwear

  • Rinse in cold water immediately after use.

  • Wash with gentle, fragrance-free detergent without fabric softeners.

  • Change every 8-12 hours or sooner if needed.

  • Air dry thoroughly before storing.

  • Store in a dry, clean place.

  • Consider occasional soaking in diluted white vinegar or baking soda for deodorizing.

Final Thought

Strange smells from period underwear are usually caused by moisture and bacteria buildup or improper washing/drying. With proper care, your period undies can stay fresh, comfortable, and odor-free throughout their lifespan.

Back to blog