How to wash out period blood underwear?

Period stains are totally normal — but let’s be honest, they’re not fun to deal with. Whether it’s a small spot or a full-on leak, knowing how to remove blood from underwear properly can help extend the life of your undies, avoid lingering smells, and keep you feeling fresh and confident.

🧬 First: What Is Period Blood, Really?

Period blood isn’t just blood — it’s a mix of:

  • Blood

  • Uterine lining (endometrial tissue)

  • Cervical mucus

  • Vaginal secretions

Because of this protein-rich combo, it can stain fabric more stubbornly than regular cuts or nosebleeds. The iron in the blood and protein in the tissue bond with the fabric fibers, especially when heat is applied — which is why hot water makes it worse.

🧼 How to Wash Period Blood Out of Underwear (Step-by-Step)

✅ Step 1: Rinse ASAP with Cold Water

  • The sooner you rinse, the better.

  • Hold the stained area under cold running water and gently rub the fabric together.

  • Don’t use hot water — it sets the stain.

💡 Pro Tip: For dried blood, soak it in cold water for 30–60 minutes to loosen the stain first.

✅ Step 2: Use a Gentle Detergent or Natural Cleaners

  • Add a small amount of fragrance-free detergent, or try:

    • Baking soda paste (1 part baking soda + 2 parts water)

    • Hydrogen peroxide (for light fabrics only — test a small spot first)

    • White vinegar (diluted 1:1 with water)

Let it sit for 10–15 minutes, then gently scrub the area.

✅ Step 3: Wash Normally — But on Cold!

  • Wash your underwear in the washing machine using cold water.

  • Use a gentle or delicate cycle with a mild detergent.

  • Avoid fabric softener — it reduces absorbency if it’s period underwear.

🧺 Best to wash with similar dark colors or alone to avoid staining other items.

✅ Step 4: Air Dry Completely

  • Hang or lay flat to dry in a well-ventilated area.

  • Skip the dryer — heat can set any remaining blood, and damage absorbent fabrics (like period underwear).

🧽 How Do I Know My Underwear Is Really Clean?

Look for These Signs:

  • The stain is gone or almost invisible.

  • The fabric feels soft and not stiff or sticky.

  • There is no smell — especially not iron or mustiness.

  • You rinsed and washed with cold water, and dried it fully.

If it still smells or feels sticky after washing, repeat the soaking and washing process or use an enzyme-based stain remover before washing again.

🛍 Best Types of Underwear for Easy Cleaning

Choose dark-colored or stain-resistant fabrics, especially if you’re prone to leaks. These brands make underwear designed to hold up through lots of washing:

  • 🖤 NYX Collection – Reusable period underwear designed for leak protection and easy care

  • 🩲 Thinx – Known for their odor-neutralizing and fast-drying fabric

  • 🌿 Aisle – Organic cotton blends with strong stain resistance

💡 Bonus Tip: Keep a “Period Care” Kit

  • Keep a small bottle of vinegar or stain remover, extra pair of underwear, and a wet bag for used items in your bathroom or bag.

  • Makes on-the-go cleanup so much easier.

📝 Final Thoughts

Period stains happen — but with quick action, cold water, and gentle care, your underwear can stay fresh and last for years. Whether you’re using regular cotton briefs or reusable period underwear, rinsing, proper washing, and full drying are the keys to hygiene and longevity.

You can download it here:

👉 Period Underwear Laundry Guide (PDF)

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