If your menstrual cup keeps slipping down, sits lower than it did when you inserted it or feels as though it may fall out, first check whether the cup has opened fully. If it has, the next things to compare are the cup's length, diameter, shape and firmness, your cervix position and whether pelvic floor or pelvic organ changes may be affecting how the cup sits.
A menstrual cup can move slightly during the day without there being a problem. Slipping is more likely to need troubleshooting when the cup progressively moves towards the vaginal opening, protrudes, leaks, becomes uncomfortable or feels as though it may come out.
Quick answer: a slipping cup does not automatically mean you need a bigger cup or that you have a weak pelvic floor. Start by checking that the cup is open, then look at fit, particularly cup length, diameter, shape and firmness, alongside your cervix position and any other pelvic symptoms.
| What you notice | Possible reason | What to check first |
|---|---|---|
| Cup moves down soon after insertion | The cup may not be fully open or positioned well | Check for significant folds or collapse and try another fold or insertion angle |
| Cup is open but gradually travels lower | Cup length, diameter, shape or firmness may not suit you | Compare the cup's actual dimensions and design rather than choosing by size label |
| Cup sits lower on some days of your period | Your cervix position may have changed | Check your cervix height during your period and compare cup length |
| Cup moves mainly during exercise | Movement, fit or cup firmness may be contributing | Compare firmness as well as length, diameter and shape |
| Cup repeatedly feels as though it is being pushed out | Fit or pelvic health changes may be relevant | Look for other symptoms such as pressure, heaviness, a bulge or bladder/bowel changes |
Is it normal for a menstrual cup to sit low?
Yes. A menstrual cup does not need to sit as high as a tampon.
Depending on your cervix height, the cup design and your anatomy, a cup may naturally sit relatively low in the vaginal canal. If the cup is fully inside, comfortable, collecting your flow and staying in position, a lower position does not necessarily mean anything is wrong.
Sitting low and slipping down are not quite the same thing.
A cup may be slipping if;
- it progressively moves towards the vaginal opening,ย
- the stem or cup body begins to protrude,
- it repeatedly feels as though it may come out
- the movement is accompanied by leaking, pressure or discomfort.
If the cup itself feels too long for the available space, compare our period care options for a low cervix or read How to Measure Your Cervical Position.
1. Your menstrual cup hasn't opened fully
One of the first things to check is whether the cup has unfolded after insertion.
A menstrual cup needs to open enough for its rim and body to maintain their intended shape and collect menstrual flow. If part of the cup remains significantly folded or collapsed, it may leak or move more easily.
Your cup does not need to make an audible โpopโ to be open. A full 360-degree rotation is not required either.
Depending on the cup, you may find it useful to:
- gently run a clean finger around the outside of the cup to feel for a significant fold or collapsed section
- move the cup slightly lower or higher
- make a small turn at the base if that helps your particular cup open
- remove and reinsert using a different fold
If your usual fold is not working well, another fold can change the insertion point and the way the cup opens.
See our Guide to Menstrual Cup Folds for different options.
What if the cup is open but still moves down?
If the cup is open but consistently travels lower during wear, look at the cup's fit and your anatomy rather than repeatedly trying to push it higher.
A cup does not have one universally correct height. If it keeps moving towards the vaginal opening, compare its length, diameter, shape and firmness.
If opening itself is the problem, use our Menstrual Cup Troubleshooter for a step-by-step check.
2. Your menstrual cup may not be the right fit
A slipping menstrual cup does not necessarily mean you simply need a larger size.
Menstrual cup sizing is not standardised. A cup labelled โsmallโ by one manufacturer can be longer, wider, firmer or differently shaped from another brand's โsmallโ.
When comparing cups, look at:
- cup length and cervix height
- diameter and overall shape
- firmness
- capacity
- stem and removal design
Cup length
Cervix height is particularly useful when comparing cup length.
A relatively long cup may feel crowded if your cervix sits low and can end up closer to the vaginal opening. A very short cup may move higher and become harder to reach when the cervix sits high.
Browse our low-cervix options and high-cervix options if cup length appears to be the issue.
Diameter and shape
Diameter affects how much width the cup carries once open, but maximum diameter is only one part of fit.
Two cups with the same maximum diameter can feel different if one is widest only near the rim and another carries more width through its body.
This is why menstrual cup shape can matter alongside diameter.
Firmness
Firmness affects how readily the cup opens and how it responds to pressure and movement.
A firmer cup may maintain its shape more readily for some people, but it can also create more bladder or vaginal pressure. A softer cup may feel gentler but may be more easily compressed in some bodies.
Read Should You Choose a Soft or Firm Menstrual Cup?.
To compare specific products by length, diameter, shape, firmness and capacity, use our Menstrual Cup Comparison Chart.
3. Your cervix may be affecting where the cup sits
Your cervix is not fixed at exactly the same height or angle throughout your menstrual cycle.
It may sit higher or lower on different days, which means the same cup can feel different as your period progresses.
If your cervix is relatively low, there may be less room for a longer cup and the cup can sit closer to the vaginal opening.
Your cervix may also sit slightly off-centre or at an angle. Your cervix does not have to sit in one perfectly centred position as long as the menstrual flow still enters the cup .
If your cup seems to slip only on particular days of your period, it can be useful to notice whether your cervix is also lower on those days.
Read How to Measure Your Cervical Position for a simple way to estimate cervix height during your period.
4. The cup's firmness or shape may not suit you
Firmness and shape can affect how a cup behaves inside the vaginal canal.
A softer cup can feel comfortable if you are sensitive to pressure, but some soft cups can be more easily compressed. A firmer cup may maintain its shape more readily, but it can feel more noticeable for someone who is sensitive around the bladder, urethra or vaginal walls.
Shape affects where the cup carries its width. A tapered cup may behave differently from a fuller bell-shaped or round cup even if their maximum diameters are similar.
There is no firmness or shape that works best for everybody.
If your cup moves down mainly during exercise or when you are active, compare firmness alongside length, diameter and shape rather than assuming you automatically need a larger cup.
You can also browse our period care options for active lifestyles or comfort-focused options depending on your main priority.
5. Pelvic floor or pelvic organ changes may affect cup position
Pelvic floor function and pelvic support can sometimes affect how an internal menstrual product feels or sits, but a cup slipping down does not by itself mean that you have a weak pelvic floor or pelvic organ prolapse.
Pelvic floor function is more complex than simply being โstrongโ or โweakโ. Muscles may be weak, overactive, poorly coordinated or have difficulty relaxing, and those situations are not necessarily managed in the same way.
Pregnancy, childbirth, menopause, constipation and straining, repeated heavy lifting and other factors can also be associated with changes in pelvic support.
Pelvic organ prolapse may cause symptoms such as:
- a feeling of pressure, fullness or heaviness in the vagina
- a feeling that something is coming down
- a visible or palpable bulge at the vaginal opening
- difficulty completely emptying the bladder or bowel
- urinary or bowel leakage
- pain or discomfort during sex
If your cup repeatedly feels as though it is being pushed out and you have symptoms such as heaviness, a bulge or changes in bladder or bowel function, speak with a GP or pelvic health physiotherapist rather than assuming another cup will solve the problem.
Read our guide to Pelvic Organ Prolapse: Types, Symptoms and Treatments, or use our Find a Pelvic Health Physiotherapist in Australia directory.
Do not automatically start doing more Kegel exercises because your cup slips down. Pelvic floor training can be useful in some situations, but the right approach depends on your individual pelvic floor function.
Does a slipping menstrual cup mean you need a bigger cup?
Not necessarily.ย A wider cup may feel more secure for some people, but slipping can also be related to:
- a cup that is too long for your cervix height
- the cup's shape
- rim or body firmness
- how the cup has opened
- your cervix position
- changes in pelvic support
Choosing a larger diameter without considering those factors may simply introduce a new problem, such as bladder pressure or discomfort.
Age and birth history alone also do not tell you which cup diameter you need.
If you are unsure which dimensions to change, compare cups in the Menstrual Cup Comparison Chart or take the Find Your Best Fit Quiz.
Can water or lubricant make a menstrual cup slip?
You may have heard that menstrual cups must always be inserted completely dry to prevent them slipping. That is too broad as a general rule.
Manufacturer instructions vary. Some cups can be dampened with water before insertion and some manufacturers permit a compatible water-based lubricant.
If insertion is uncomfortable or dry, making it unnecessarily difficult is not helpful.
If you use lubricant:
- check that it is compatible with your cup material
- use a small amount around the rim or vaginal opening rather than coating the entire cup
- follow your cup manufacturer's instructions
Using a large amount of lubricant can make the cup harder to grip and control during insertion, so reduce the amount if that seems to be happening.
See our guide to choosing a personal lubricant if you want more information about lubricant types and compatibility.
Can exercise make a menstrual cup slip down?
Exercise can change how a menstrual cup feels, particularly during activities involving repeated impact, squatting, jumping or heavy lifting.
A little movement during activity is not automatically a problem.
If the cup repeatedly feels as though it is being pushed towards the vaginal opening during exercise:
- check that it is open and comfortable before you start
- compare its length and diameter
- consider whether its shape or firmness is contributing
- notice whether the same thing happens during coughing, bowel movements or ordinary daily activity
A cloth pad or liner can provide backup protection while you troubleshoot a new cup or work out how it behaves during exercise.
You can also browse period care options for active lifestyles or read A Guide to Working Out During Your Period.
When should you stop troubleshooting and seek advice?
Consider speaking with a GP or pelvic health physiotherapist if your cup:
- causes persistent pain or significant pressure
- repeatedly feels as though it is being expelled
- is associated with a new feeling of vaginal heaviness or pressure
- is associated with a visible or palpable vaginal bulge
- coincides with difficulty emptying your bladder or bowel
- is associated with new urinary or bowel leakage
- has become significantly more difficult to use following pregnancy, childbirth or pelvic surgery
- continues to cause problems despite reasonable fit and technique adjustments
These symptoms do not prove that you have pelvic organ prolapse or another pelvic floor condition, but they are useful reasons to seek an individual assessment.
You can use our Australian pelvic health physiotherapist directory to find a practitioner.
Frequently asked questions
Is it normal for a menstrual cup to move down?
A little movement can be normal because a menstrual cup does not remain in one fixed position throughout the day.
It is worth troubleshooting if the cup repeatedly reaches the vaginal opening, protrudes, leaks, becomes uncomfortable or feels as though it may fall out.
Why does my menstrual cup fall out when I poop?
Bearing down during a bowel movement increases pressure through the abdomen and pelvic floor and can move an internal menstrual product lower.
If this happens occasionally, you may prefer to remove your cup before a bowel movement.
If the cup is regularly being pushed towards or through the vaginal opening, especially if you also have pelvic heaviness, a bulge or bowel or bladder symptoms, consider discussing it with a pelvic health professional.
Does a slipping menstrual cup mean it is too small?
No.ย Diameter is only one part of menstrual cup fit. Length, shape, firmness, cervix height and your anatomy can all affect how the cup sits.
Should a menstrual cup sit high or low?
There is no single correct height.ย A cup can sit relatively low and still work well if it is fully inside the vagina, comfortable and collecting menstrual flow. Sometimes cups find their natural resting place in the vaginal canal regardless of where you initially place them.ย
Why is my menstrual cup stem sticking out?
The cup may be sitting relatively low, the stem may be too long or the cup body itself may be too long for the available space.
If the cup body fits comfortably and only the stem causes irritation, check whether the manufacturer permits trimming it.
If the cup body itself feels crowded or sits at the vaginal opening, compare a shorter cup rather than relying on stem trimming alone.
Can a low cervix make a menstrual cup slip down?
A relatively low cervix can reduce the space available for a longer cup and may cause it to sit closer to the vaginal opening.
Start by comparing cup body length rather than assuming you need a wider cup.
Can a high cervix make a menstrual cup slip?
A high cervix does not necessarily cause a cup to slip down. A shorter cup may instead move higher and become harder to reach.
Cervix height is most useful for comparing cup length and removal reach.
Can pelvic organ prolapse make a menstrual cup fall out?
Changes in pelvic support can affect how an internal menstrual product sits for some people, but a slipping cup alone does not diagnose pelvic organ prolapse.
Symptoms such as pelvic heaviness, vaginal pressure, a bulge, difficulty emptying the bladder or bowel or new urinary or bowel leakage are reasons to seek professional assessment.
Should I do Kegel exercises if my menstrual cup keeps slipping?
Not automatically.ย Pelvic floor symptoms can involve weakness, tightness, coordination or changes in pelvic support. Strengthening exercises are appropriate for some people but not every pelvic floor problem.
If you also have pelvic symptoms, an assessment from a pelvic health physiotherapist can help determine what type of exercise or treatment is appropriate.
Why is my cup open but still moving down?
If the cup is fully open but consistently moves lower, compare its length, diameter, shape and firmness and consider whether your cervix position changes during your period.
Use our Menstrual Cup Troubleshooter if you are not sure which factor to check next.
Still not getting the right fit?
Cup opens properly but still slips down? Compare cup length, diameter, shape, firmness and capacity in the Menstrual Cup Comparison Chart.
Not sure which combination might suit you? Take the Find Your Best Fit Quiz.
Cup is leaking, collapsing, hurting or behaving differently? Use the Menstrual Cup Troubleshooter.
Know your main priority? Browse Shop by What Matters to You.
Experiencing vaginal pressure, heaviness, a bulge or bladder or bowel symptoms? Consider speaking with a GP or pelvic health physiotherapist rather than treating the problem as cup fit alone.
Related reading
- How to Use a Menstrual Cup
- What Size Menstrual Cup Do I Need?
- How to Measure Your Cervical Position
- Menstrual Cup Shapes Explained
- Should You Choose a Soft or Firm Menstrual Cup?
- A Guide to Menstrual Cup Folds
- Why Is My Menstrual Cup Leaking?
- What to Do If Your Menstrual Cup Is Hurting
- Pelvic Organ Prolapse: Types, Symptoms and Treatments
This article provides general information about menstrual cup use and is not a diagnosis or substitute for individual medical advice. Product instructions vary, so always follow the instructions supplied with your menstrual cup.
Sources
- Healthdirect Australia, Prolapsed uterus โ symptoms and treatment
- Continence Health Australia, Pelvic organ prolapse
- Continence Health Australia, Pelvic pain and bladder and bowel changes
- van Eijk AM et al., Menstrual cup use, leakage, acceptability, safety and availability: a systematic review and meta-analysis