One of the most frustrating experiences during your period is dealing with leaks—especially if you’re at work, school, or somewhere important, but then realize it’s too late, and notice that others have seen it too.
Most people are familiar with pads and tampons, so they know how to troubleshoot leaks by switching to a thicker pad or using higher-absorbency tampons.
Menstrual cups, however, work differently. Unlike pads or tampons, a period cup doesn’t absorb fluid but collects it. That means leaks often happen due to improper insertion, incorrect sizing, or a poor seal rather than insufficient absorbency. This can make troubleshooting feel confusing for beginners. But once you know how to prevent leaks, using a menstrual cup becomes easier—and often more reliable—than traditional period products.
Why Menstrual Cup Leaks Happen
1. Incorrect Cup Size or Fit
One of the most common reasons menstrual cups leak is using the wrong size or shape for your body. Cups come in different sizes based on factors like cervix height, flow volume, and pelvic floor strength.
- A cup that’s too small may not seal properly, allowing leaks.
- A cup that’s too large may not fully open or stay in place.
Choosing the right menstrual cup size is key to preventing leaks. Try out our cup size quiz here.
2. Improper Insertion
If your cup isn’t inserted correctly, it won’t form a proper seal against the vaginal walls. A common mistake is inserting the cup too high or not ensuring it fully opens.
After inserting your cup, twist it slightly or run a finger along the base to confirm that it has properly sealed.
3. Cup Not Fully Opened
Your menstrual cup should fully expand once inside. If it stays partially folded, gaps may form, leading to leaks.
Check by rotating the cup slightly or using a finger to feel around the rim to ensure it’s fully opened and creating a leak-proof barrier.
4. Overflow from a Full Cup
If your cup reaches its maximum capacity before you empty it, it will overflow. Those with a heavier flow may need to empty their cup more frequently to prevent this.
5. Incorrect Positioning Within the Cervix
Every person’s cervix position is different, and if your cup sits too high or isn’t aligned with your cervix, leaks may occur.
- If you have a tilted or low cervix, you may need to adjust the insertion angle.
- Some people may need to choose a cup designed for their cervix height for a better fit.
Things to Do Before You Insert Your Menstrual Cup
Find the Right Cup for Your Body
Choosing the correct cup size is crucial in preventing leaks. We offer a menstrual cup quiz to help you decide.
- Low cervix? A shorter cup may be more comfortable.
- High cervix? A longer cup is easier to reach.
- Strong pelvic floor muscles? A firmer cup may work best.
- Sensitive to firmer materials? A softer cup could be more comfortable.
Practice Insertion Before Your Period
If you’re new to menstrual cups, try inserting and removing the cup before your period starts. This allows you to figure out the best folding technique and positioning without worrying about leaks right away.
Trim the Stem If Needed
Some menstrual cups have a stem to help with removal, but if the stem is too long, it can cause discomfort or affect the cup’s placement. Trimming it to a comfortable length can improve fit and prevent leaks.
Relax Your Pelvic Muscles
Tense pelvic floor muscles can make insertion difficult and prevent the cup from sealing properly. Try:
- Taking deep breaths
- Squatting while inserting
- Inserting the cup in the shower for easier placement
Use Water or a Water-Based Lubricant
A small amount of water or water-based lubricant can make insertion smoother. If you experience discomfort, this can help the cup glide in more easily.
Tips to Avoid Leaks While Using a Menstrual Cup
Use the Right Fold
The way you fold your cup before inserting it affects how well it opens inside. Some common folds include:
- C-fold: Quick expansion, but can be wide for beginners
- Punch-down fold: Creates a smaller insertion point, easier for beginners
- 7-fold: Slimmer shape, helpful for positioning
If one fold doesn’t work, try another until you find the best menstrual cup fold for your body.
Check the Seal After Inserting
One of the most effective ways to prevent leaks is making sure your cup has fully opened and sealed against your vaginal walls.
After insertion:
- Run a clean finger around the base to check for gaps or folds.
- Gently rotate the cup to help it pop open.
- Tug the cup lightly—if there’s resistance, the seal is secure.
Angle the Cup Toward Your Tailbone
Many people insert their menstrual cup straight up, like a tampon. However, the vaginal canal isn’t vertical—it angles toward the tailbone.
To prevent leaks, insert the cup at a slight backward angle to align it with the vaginal canal.
Avoid Placing the Cup Too High
Pushing the cup too high can cause it to shift past your cervix, allowing fluid to bypass the cup and leak.
Your menstrual cup should sit just beneath the cervix, where it can properly collect menstrual fluid.
Empty the Cup Regularly
Even though menstrual cups hold more fluid than tampons, they still need to be emptied periodically.
- Light flow? You may be able to go up to 12 hours before emptying.
- Heavy flow? You may need to empty your cup every 6–9 hours.
If your menstrual cup leaks despite proper insertion, track how quickly it fills up and adjust your emptying schedule accordingly.
Conclusion
Menstrual cups are a reliable, eco-friendly alternative to pads and tampons, but occasional leaks can be frustrating. By choosing the right cup size, inserting it correctly, and ensuring a proper seal, you can significantly reduce leaks.
With a little practice, Ivy Cup provides all-day leak protection, making your period more comfortable and worry-free.