9 Reasons Why Your Menstrual Cup Might Be Leaking & How You Can Fix It

Having a menstrual cup is a gift sent from the menstrual gods, but it can be really frustrating having to deal with leaking problems! No one wants to deal with bloody underwear and an emergency bathroom call. Should you lose hope in all menstrual cups? Absolutely not! There are a few reasons we think your cup might be leaking, and we’ll tell you how to fix it!

Do you have the right size cup?

Lunette offers two sizes; Model 1 and Model 2. Model 1 is designed for those with a light to moderate flow, and is a little smaller in size than Model 2, which is for those who have a moderate to heavy flow. It doesn’t matter if you’ve just started your first period ever, or if you’ve had sex, if you have a light flow, Model 1 should feel right for you. Now, if you have a pretty heavy flow and you’re using the Model 1, the reason why you’re leaking might be because you need a bigger cup! Try using the Model 2 and see how that feels. It’s a little firmer, but it will hold more menstrual blood.

You might need to empty your cup more frequently

Although we say you can empty your cup every 12 hours, some people might need to empty it earlier than others. If you have a heavier flow and you’re already using the Model 2, try emptying your cup every 4 or 6 hours to see if that does the trick!

Locate your cervix

This might sound a little invasive (let’s be real, nothing is invasive for us), but knowing how low or high your cervix is might help you insert your menstrual cup correctly! During menstruation, the cervix may move from its normal position. If you have a low cervix, chances are you might have to cut the stem of your cup in order for it to fit comfortably in your vagina, and if you have a tilted cervix, you might have to tilt your pelvis up and sit back a little more so that you’re not directly inserting your cup straight up. One thing to keep in mind is that your cup might be placed too high and not directly below your cervix, which could result in leakage because blood isn’t able to flow properly into the cup.

If you’re feeling a little curious, locate your cervix when you’re on your period and when you aren’t so you can see if it’s moved around! It should feel like the tip of your nose, in other words…soft and squishy!

After inserting, rotate the cup and pinch the sides to make sure it fully opens

Rotating your cup should become second nature to you soon after inserting your cup! It will prevent those unwanted air pockets and will suction onto the walls of your vagina, preventing menstrual blood from leaking around the cup.

Try a different fold method

The all time favorite C-fold might not be the one for you! It could be causing some air between the cup and the vaginal canal. Try our other folding methods like the punch-down method or triangle fold! We have a handy-dandy how-to video that shows you all the folding methods!

Squat to make insertion easier

Sometimes standing up can be uncomfortable and awkward – try squatting over your toilet or in the shower! As mentioned earlier, it will cause your pelvis to tilt a little, which can make the cup hug the vaginal canal easier.

Every time you poop, you might be pushing it down

This might not be a problem for you, but when you use the bathroom to poop, you’re pushing your menstrual cup down too (especially if you have strong pelvic floor muscles). However, because your cup has a strong suction inside the vaginal canal, it won’t fully come out and fall into the toilet. All you need to do is push it back up a little so it can go back to its normal place. Oh, and don’t forget to wash your hands every time you adjust your cup!

The air holes on your cup aren’t getting cleaned properly

You know those tiny little holes at the top of your cup? Those allow for proper suction inside your vagina. If they are blocked by blood or other bodily fluids, the cup won’t form a proper seal inside, so make sure all four air holes are open and clean every time you rinse your cup!

Try pelvic muscle exercises

If your cup leaks after you have tried all of these tips, the culprit may be your pelvic muscles. If your pelvic muscles are weak, they cannot hold the cup tight against the vaginal wall. The cup usually leaks when you get up from a seated position. Kegel exercises strengthen the pelvic muscles and prevent future problems like urinary leakage.


No one wants a leaky cup, so if these tips helped you in any way, let us know, and if we didn’t mention a solution that’s helped you, also let us know! We want you to feel supported every step of the way on your menstrual cup journey


Hi Keira! Sorry to hear about the leaking! Yes, changing position can change your cervix height/position enough to impact menstrual cup use. Don’t hesitate to reach out to us at info@lunette.fi and we’re more than happy to keep troubleshooting. :) -Team Lunette

Lunette Menstrual Mentor September 02, 2021

Hi Bea! Email us at info@lunette.fi and we’ll help troubleshoot the leaking! :)
-Team Lunette

Lunette Menstrual Mentor August 16, 2021

I find that my cup doesn’t leak at all when I wear it at night, but leaks quite a bit when I’m at work and sitting/standing up frequently. Could this be a sign that my pelvic floor muscles are weak? I’m 17 and don’t have any bladder problems. My other theory is that my cervix sits in the cup when I’m standing but not when I’m lying down. Would that change in position realistically cause the cervix to move in that way?

Keira August 23, 2021

I’ve been using my cup for only a day and a half and have already had to empty it 4 times. I can’t tell if I just have a weirdly heavy flow or if I need size two. But my parents probably won’t give me money to buy one seeing as I JUST purchased a cup. Should I keep at it for a couple cycles or petition them for size two?

Bea August 16, 2021

Hi Senni! If this post wasn’t helpful in fixing the leaking we’re more than happy to troubleshoot via email! Just send us an email at info@lunette.com and we’ll sort out the leaking. :)
-Team Lunette

Lunette Mensrtual Mentor June 29, 2021

Hi! I just started to use my cup yesterday and the fisrt time I put it in I had no problems. But after that everytime it keeps leaking.

Senni June 29, 2021

Hi Shelly! We’re so sorry to hear your Cup keeps leaking! Please don’t hesitate to email us at info@lunette.fi and our Menstrual Mentors are happy to troubleshoot this for you. :)
-Team Lunette

Lunette Menstrual Mentor May 20, 2021

I’ve been using my cup for 7 months and it’s always leaks. No matter how high or low I place it. Sometimes it moves higher up in my vagina and tilts to the right.And I know it’s opened properly. It’s so frustrating I’m thinking of just sticking to pads and tampons because I end up having to use pads to catch leaks anyways.

Shelly May 20, 2021

Hi Laura! Thanks for your question! The Cup should be placed directly underneath the cervix so that it can catch the flow. If your cervix is sitting in the Cup it can take up valuable space and cause the Cup to overflow. If the cervix is sitting next to the Cup, the Cup won’t be able to collect any flow and it will all flow past the Cup. If you require further troubleshooting please don’t hesitate to contact us at info@lunette.com!
-Team Lunette

Lunette Menstrual Mentor March 04, 2021

Hi there !

I have been using a period cup, but I’ve struggled with positioning it as I’m always always getting leaks. I’ve recently been able to identify my cervix, and I’ve been putting the period cup onto the cervix so that my cervix is essentially in the period cup. Could this be why it is leaking?

Thank you!

Laura Ann Mitchell March 04, 2021

Hi Marie!
Sorry to hear your Lunette Cup has been leaking! The likely culprit is indeed the cervix sitting in the cup, taking up space and causing it to overflow. To fix this try wearing your cup as low as possible on your heavy flow days, as the cervix often moves even lower for the heaviest days. And please don’t hesitate to contact us at info@lunette.com and our Menstrual Mentors are more than happy to assist with further troubleshooting! <3
-Team Lunette

Lunette Menstrual Mentor October 01, 2020

So its my first time to use your cup the small size one, and the first night/day was okay no leaks (maybe because it was lighter) but the 2nd day when i was laying down I experienced leaking, and rushed to the bathroom right away only to find out the cup is just half full. The 3rd day I woke up with leaks too (I emptied it 12midnight) I woke up 7am because I felt the blood.

I have low cervix, is this has to do with the fullness of the cup that’s why it leaks? Or is it my cervix.

Thank you!

Marie October 01, 2020

Hey Mehra! Please contact us at info@lunette.com so our Menstrual Mentors can better help troubleshoot the issues you’re experiencing! :)
-Team Lunette

Lunette Menstrual Mentor April 09, 2020

I am experiencing that my cup doesn’t open frequently. And even when it’s open then also in the morning it doesn’t only leak my all blood comes out. Can it be because I have had sex? It was my first time. And I’m having these problems now (after it) before sex I didn’t have these problems. Should I use other cup size?

Mehra April 09, 2020

Hi Vartika! That’s a great tip! Thank you for sharing :)
-Team Lunette

Lunette Menstrual Mentor April 01, 2020

Hey, there was one more reason the cup leaked for me. I used to put the lube ON the cup,then i noticed the lube covered the holes and I used to get leaks. So once instead of using lube on my cup, i used it on the vulva amd inserted the cup wetted with water only , the cup went smoothly in. Hope this could work for you.

Vartika April 01, 2020

Hi Jaimee!

Thanks for getting in touch! Go ahead and email us at info@lunette.com so that one of our amazing Menstrual Mentors can help troubleshoot what’s causing the leaking. :)

Team Lunette

Lunette Menstrual Mentor January 03, 2020


I tried your model 1 for 2 days now, is it normal that the blood leaks when I uses the bathroom? Thank you

Jaimee January 03, 2020

Hi Danielle!

Please don’t hesitate to reach out at info@lunette.com so one of our amazing Menstrual Mentors can help troubleshoot the issue for you! :)

Team Lunette

Lunette Menstrual Mentor December 20, 2019

My cup leaks less than an hour after I put it in. I know it’s open properly, the tiny holes are clear, and it’s definitely not full. I’ve tried several of the folding methods but I am still having this issue. It’s really frustrating.

Danielle December 20, 2019

Hi Jessica!

Thanks for your question! We’d be happy to troubleshoot the issues you’re experiencing. Would you mind emailing us at info@lunette.com so we can ask you a few questions to better help you with this :)

Team Lunette

Lunette Menstrual Mentor November 01, 2019

Hi Lunette,

So I did a test run before getting my period and I cannot get the cup to open completely. I have very tight and toned muscles and the cup keeps denting in on the sides and I can’t rotate it and I’ve tried every possible tip I’ve seen on YouTube or read and I just can’t get it to completely open. Is it possible it’s still open at the top but just slightly dented on the sides from the suction or my muscles just being really tight?

Jessica November 01, 2019

Hi Stasa!

Sorry to hear that you’ve been having problems with your cup!

The pain is most likely caused by the fact that the cup touches your cervix. It is not dangerous but it can feel very uncomfortable or even hurt. You can avoid this by placing the cup as low as possible.
The cervix may move during the period and it may be that it is sitting lower on the first two days of your period, making it a bit more challenging to get the cup positioned under the cervix.

If the cup rises by itself try this little trick to avoid it: when you insert the cup let it open before it is completely inside your vagina, and push it in when it has opened. This way the seal won’t become so strong :)

Best regards,
Team Lunette

Lunette Menstrual Cup August 30, 2019

Dear Lunette,
I’m a 17 year old virgin with a high cervix and a heavy flow and I’ve been using your size two cup for about 6 months now. It’s working perfectly except for the first and second day of my cycles. During those days I usually have very strong cramps and the cup is always pushed down immediately if I even manage to set it in place. I switched back to using pads during the first days of my period but that kind of defeats the purpose of the cup in the first place. I was wondering if you could give me some advice and tell me how I could try and fix my problem.
Thank you
With much love

Staša August 30, 2019

Hi Serena,

it could be that your cervix is sitting in the menstrual cup, taking away some of its capacity. Therefore your cup may start to leak because it is (due to the cervix sitting in the cup) so to say already full.
You don’t necessarily need to start using the bigger cup. But you may need to think about emptying it after 6 hours.
You could try if you can place your cup a little bit lower in the vagina. Depending on how low your cervix sits, you might be able to avoid the cervix being in your cup when you place it a bit lower than you have done so far.

Team Lunette

Lunette Menstrual Cup July 18, 2019

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