FAQ: All your questions about menstrual cups and period panties

Welcome to this FAQ dedicated to all your questions about menstrual cups and menstrual underwear!

Menstrual cups and period underwear, silicone cups and absorbent menstrual lingerie, cups and tangas—washable, reusable period products are now great eco-friendly and innovative alternatives to traditional menstrual products (tampons, pads, liners).

At LouLoucup, we strongly believe in offering healthy, cost-effective, and comfortable alternatives to traditional hygiene products. However, switching to these reusable period products can come with questions or even doubts!

In this article, Louloucup answers all your questions about menstrual cups and period underwear. Whether you’re just curious about how they work, want to know their benefits, or need advice on how to care for them, this menstrual cup and underwear FAQ will guide you step by step. You’ll also find a very clear, detailed comparison to help you decide if you’re torn between the two options.

The menstrual cup (a small, soft, inverted silicone bell) has become a must-have alternative for those seeking hygiene, comfort, and environmental responsibility. Very economical, this little reservoir is inserted into the vagina, collects flow, is emptied, rinsed, and reinserted.

The menstrual cup is an internal period protection made of medical-grade silicone, designed to collect menstrual blood. Unlike tampons, it doesn’t just absorb your flow—it collects it, which limits exposure to air and helps prevent bad odors. The cup is leak-proof. It unfolds against the vaginal walls and stays in place. Available in two sizes (small and medium), both Louloucup menstrual cups are suitable for all flows (light, medium, heavy, or very heavy) and all body types (never given birth, moms, sensitive bladders).

How does a menstrual cup work?

When the menstrual cup is inserted correctly (it sits at the top of the vagina and unfolds to create a light, leak-proof seal), you won’t feel it. This seal prevents blood from leaking, giving you reliable menstrual protection for several hours. The unique, patented design of the LouLou cup ensures easy insertion and optimal comfort all day long.

What are the benefits of using a menstrual cup?

• Eco-friendly and economical: Reusable for several years, the menstrual cup dramatically reduces waste from disposable products. It’s an investment that pays off quickly.
• Hygienic: Menstrual blood stays contained inside the cup, minimizing the risk of odors. The menstrual flow doesn’t come into contact with air and doesn’t oxidize.
• Convenient: Suitable for all menstrual flows, the period cup lets you manage your period discreetly, whether in daily life, during sports, or even while swimming.
• Comfortable: Made from medical-grade silicone, the menstrual cup is soft, flexible, supple, and gentle on your intimate area.

How do you clean and care for your menstrual cup?

To ensure your cup stays perfectly hygienic:

• After each use, rinse the cup with cold water to remove blood, then with warm water and a mild (fragrance-free) soap.
• At the end of your period and before starting a new cycle, sterilize it by placing it in a pot of boiling water for about 5 to 10 minutes or use the Louloucup sterilizer.
• Regularly check the condition of the silicone and replace it if you notice any damage.

How long can you wear a menstrual cup?

For optimal comfort and impeccable hygiene, it’s recommended to empty, clean, and reinsert your internal protection every 4 to 6 hours. It’s not recommended for overnight use. Louloucup recommends heavy flow menstrual underwear for a leak-free night with no stains on your pajamas or sheets.

Is the menstrual cup safe for your health?

Yes, the cup is made from certified medical-grade silicone, free of phthalates, BPA, and toxic substances. Numerous studies confirm its safety and effectiveness. However, it’s important to follow hygiene and care recommendations to avoid any risk of infection. You should keep your cup in for a maximum of six consecutive hours.

Can you use a menstrual cup with an IUD?

Generally, it’s possible to use a menstrual cup along with an IUD, as long as inserting the cup doesn’t interfere with the IUD’s position. In any case, you must get the green light from your midwife or gynecologist.

Is using a menstrual cup painful?

No! A properly positioned cup is one you can’t feel. If you feel discomfort or pain, it could be due to incorrect insertion. Take the time to get to know your body and don’t hesitate to try different folding techniques to find the one that works best for you.

What to do if you have leaks or trouble with your cup?

Make sure the cup is properly positioned and, if needed, adjust it. Before using it outside the house, try it at home first to get comfortable with how it works. If leaks persist after several tries, don’t hesitate to ask a healthcare professional for advice.

Menstrual underwear is an eco-friendly, stylish, and effective alternative for managing your flow with ease. Washable, durable, and comfortable, period panties or hygienic underwear help you get through your period with less mental load.

General information about period underwear

How do you choose the right size for period underwear?

LouLoucup period panties are available (depending on style and stock) from XXS (teen) up to 5XL to fit every body type. For the perfect fit, we recommend checking the size guide before ordering.

Which model should you choose based on your flow?

• For a light flow or for vaginal discharge, we recommend the Mia model—thin, delicate, and made of black lace.
• For medium flow, the Naomi underwear offers a flattering fit, or the Lucie model, which is fun and feminine. Its discreet, fine gold trim adds a touch of elegance, and its flat seams make it invisible under tight clothing.
• For a heavy flow, we recommend the Simone or Fanny panties.
• Finally, for a very heavy or hemorrhagic flow caused by a copper IUD, you have plenty of options: Léo, Jade, Liv, Mathilde, or Clara will be perfect for you!

How do you wash and care for period underwear?

To keep your period underwear soft and absorbent, it’s best to care for it gently:

• Rinse the underwear in cold water after each use to remove as much menstrual flow as possible.
• Hand wash or machine wash (short, delicate cycle at max 30°C/86°F) with a gentle organic detergent if possible, and no fabric softener. Never use bleach or harsh chemicals that could damage the organic cotton fibers.
• Air dry your underwear and avoid any heat source (dryer, heater, etc.)

How long can you wear period underwear for?

Period underwear is designed to provide reliable protection day or night. However, if your flow is very heavy, it may be wise to use them alongside other protection at night or during extended activities. For medium flow, our styles typically offer several hours of leak-free use.

Are period panties effective against leaks?

Yes, our period panties are designed to provide excellent absorption even during extended wear. We always recommend testing your panties at home first before wearing them out, at school, or at work.

Can you wear menstrual underwear at night?

Yes, absolutely. Lots of users wear period underwear at night and use the cup during the day. For a peaceful, leak-free night, choose underwear with a high, extended absorbent area that goes up both the front and back (Clara or Liv are perfect). That way you can sleep on your stomach or back for hours without worrying about leaks!

Is period underwear discreet under clothes?

Absolutely! Thanks to their flat seams and carefully designed fit, our period underwear is virtually invisible under your clothes. They’re thin and don’t bulk up. If you’re looking for completely invisible protection, check out our seamless collection. Our top models, Liv and Gaby, are customer favorites! Black, smooth, and invisible, this lingerie is as thin as it is absorbent and highly reliable. Truly a must-have!

What should you do if you have a problem or discomfort with your period underwear?

• Make sure the size fits your body perfectly.
• If you’re having trouble, try a few tests at home to find the best way to wear it.
• Don’t hesitate to contact our LouLoucup customer service team for personalized advice and help choosing your model.

Personalized advice based on your needs

• If you’re an active athlete or a swimmer, the menstrual cup is ideal. It stays in place and provides discreet protection, without discomfort during activities.
  
  
• If you prioritize comfort and simplicity, period underwear is the way to go. It’s soft, easy to care for, and stays invisible under clothes, letting you feel good all day or night.
• If your flow varies, you can combine both options. For example, use the cup during the day and switch to period underwear for downtime or longer outings. This way, you always have protection that matches your flow and your activities.

What kind of budget should you plan for?

Investing in a cup or period underwear costs more upfront than disposable products, but it’s a smart investment in the long run. Don’t hesitate to create your own custom set with your favorite period products—cup, underwear, thong—pick your styles and sizes with no limits and enjoy automatic discounts in your cart. The more products you add, the more you save.