Menstrual underwear odor: Louloucup tips

Period panties are an eco-friendly and economical alternative to disposable products. However, like any washable period protection, they can sometimes develop bad odors. That makes the experience far from optimal or comfortable. Stubborn smells can even be a major reason some people hesitate to try menstrual lingerie.

What causes these unpleasant odors? How can you get rid of them effectively? Let’s take a look at how to care for your period panties properly to avoid any unwanted smells! Period panty odor? Let’s talk about it!

I - Why does my period panty smell bad?

Odors appearing on period underwear can have several causes, which are perfectly natural but sometimes bothersome. Understanding the causes is the first step to dealing with them effectively.

Metallic smell

When menstrual blood is exposed to air, it undergoes an oxidation process that can create a characteristic metallic smell. This smell is completely normal and usually becomes stronger over time. If you leave your used period panty for several hours without rinsing it, the smell can become more noticeable.

Ammonia smell

Some women sometimes notice a smell of ammonia coming from their menstrual panties. This ammonia smell is often linked to the breakdown of urea present in the small amounts of urine that can come into contact with the panties. This is particularly common if you wear your panties for a long time or if you have light urinary leaks.


Other causes of bad odors


Other factors can influence the odor:


  • Diet: certain foods can change the smell of menstrual blood.
  • Hydration: a lack of water can intensify body odors.
  • Vaginal infections: they can change the natural smell of your discharge.
  • Bacteria: they grow quickly in a warm, humid environment.

If you notice a fishy smell or a particularly unpleasant and unusual odor, this may indicate a possible vaginal infection such as bacterial vaginosis, which requires medical attention.


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II – How to get rid of odors in menstrual panties? 🧼


The good news is that there are several effective ways to remove bad odors from period panties. Here’s a step-by-step guide to keeping your period panties fresh and odor-free:

odeur culotte menstruelle

🫧 Immediate rinse


This is the most important step to prevent bad odors from becoming deeply embedded in the fabric.

Rinse your period panty in cold water as soon as possible after use.

Cold water is essential, because hot water sets blood stains.

Keep rinsing until the water runs clear.

Avoid rubbing vigorously so as not to damage the absorbent fibers.

🫧 Preventive soaking


For optimal odor removal, soaking your menstrual underwear is a really useful step.

Soak your underwear in cold water with white vinegar added (one part vinegar to three parts water). It’s important to dilute the white vinegar and not use it undiluted.

White vinegar is a natural deodorizer that neutralizes odors.
A 30‑minute to 1‑hour soak is usually enough.
Baking soda (1 tablespoon in one liter of water) is also an effective alternative.

🫧 Machine wash

For a thorough clean, you probably already know this, but here’s a reminder of what you need to do:

Wash your period panties at a maximum of 30°C on a delicate cycle (preferably a short cycle).

Use a gentle detergent, without bleaching agents or fabric softeners (a delicate or eco-friendly laundry detergent).

Avoid vigorous spin cycles, which can damage the fabrics.

Place your period underwear in a laundry bag to protect its technical fibers.

Did you know?
Marseille soap or black soap are excellent natural options for tackling odors. You can gently rub the absorbent area with soap before machine washing for optimal results.

🫧 Proper drying


Once washed, and to preserve the qualities of your panties:

Always opt for air drying.

Absolutely avoid the tumble dryer, which damages the absorbent fibers.

Don’t expose it directly to the sun, which can weaken the elastic, or to any heat source (radiator, fireplace, hair dryer).

Make sure it is completely dry before putting it away.

Did you know?
Depending on the style, period panties can take quite a while to dry. Be patient. This is also why we recommend having several pairs of period panties on hand.

III – Care tips for Louloucup period underwear 💙

Louloucup period panties are carefully designed to offer optimal comfort and excellent absorbency. To preserve their quality and prevent unpleasant odors, here are a few specific tips:

The unique composition of Louloucup period panties, with their organic cotton lining, requires a few special care steps. For optimal maintenance, choose a gentle detergent, ideally eco‑friendly and fragrance‑free. Conventional detergents often contain chemical agents that can damage the fabric’s absorbent properties and make odours linger.

Our **menstrual panties** are designed for different flows – from very light to very heavy. If you have a very heavy flow, remember to change your panties more often to avoid fiber saturation and the appearance of odors. Our Mathilde menstrual panties are specially designed for **very heavy flows**, with an absorbency equivalent to 5 tampons!

For a deep clean and effective odor removal, you can occasionally give your panties a sun bath: after washing, leave them in indirect sunlight for a few hours. UV rays have natural disinfecting properties that kill the bacteria responsible for bad smells.

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IV – Bad odors: when should you see a doctor? 🩺

Although odors related to period panties are generally harmless and easy to remove with proper care, some situations do require medical attention.

If you notice a strong, unusual smell that persists despite proper washing of your underwear, this may indicate a vaginal flora imbalance or an infection. Fishy, rotten-egg or particularly unpleasant odors, especially if accompanied by abnormal discharge, itching, burning or pain, should prompt a medical consultation.

Certain infections such as bacterial vaginosis, vaginal yeast infections or STIs can change the smell of your discharge and, as a result, the smell of your period panties. Early diagnosis allows for fast, effective treatment so you can restore your intimate balance.

Remember, your doctor or gynecologist is there to help you without judgment – your intimate health matters!

V – Choose the right period underwear to reduce odours 🛍️

Choosing the right menstrual underwear can greatly influence the occurrence of odors. Here are some criteria to consider:

Adapted to menstrual flow


Choose styles suited to your flow—that’s important. At Louloucup we have three distinct ranges of underwear depending on flow intensity: light, medium or heavy.

  • For a light flow: choose our Lucie panties, thin and discreet, which limit heat and moisture.
  • For a medium flow: our Louise brief offers a great balance between absorbency and breathability.
  • For heavy flow: the Mathilde panties, with their high absorbency, mean you don’t have to change as often.

Materials and design

Louloucup panties have specific features designed to minimise odours:

  • lining in certified organic cotton that lets the skin breathe,
  • absorbent fabric treated for its antibacterial properties,
  • design that allows good air circulation to prevent excessive moisture.

Frequency of change


Even with the best menstrual panties, it is recommended to change them every 12 hours maximum, or more frequently on heavy flow days. Having several menstrual panties allows you to alternate them and wash them properly between uses. Louloucup panties are designed to offer optimal protection while minimizing the risk of unpleasant odors. Their premium composition of natural (cotton, bamboo) and breathable materials makes them an ideal choice for comfortable and worry-free menstrual hygiene.

Check out Louloucup’s Teen range! 😎

FAQ: Odors and period underwear

How do I know if the smell of my period underwear is normal?

A slight metallic or neutral smell is completely normal. It’s simply the natural scent of oxidized blood. However, a strong fishy, ammonia-like, or particularly unpleasant and persistent odor may indicate a hygiene issue or an infection and should not be ignored.

Doesn’t white vinegar damage the fabric of my period underwear?

No, when properly diluted (1 part vinegar to 3 parts water), white vinegar is safe for the fibers of your period panties. It’s even recommended for its natural deodorizing and disinfecting properties. However, avoid using it undiluted or too frequently.

Why does my period underwear develop an ammonia smell?

The smell of ammonia usually comes from the breakdown of urea in small amounts of urine that may come into contact with the panties. To avoid this, make sure you wipe carefully after using the toilet and change your panties regularly, especially on heavy-flow days.

How long can I wear my period panties before they start to smell?

It’s recommended not to wear the same period underwear for more than 12 consecutive hours, even if your flow is light. In case of a heavy flow, it’s best to change it every 6 to 8 hours to avoid saturation and the appearance of odors. With Louloucup panties, you benefit from excellent absorbency that lets you stay relaxed for longer.

Can probiotics help reduce menstrual odor?

Yes, probiotics can help maintain a healthy balance of vaginal flora, which can indirectly reduce odors. You can consume them as dietary supplements or in fermented foods like yogurt or sauerkraut. A balanced vaginal flora is less likely to develop unpleasant odors during menstruation. Remember, every body is unique! If you have specific questions about your menstrual hygiene, our Louloucup advisors are here to help you choose the protection that suits you perfectly.

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