How to Insert a Menstrual Disc: Step-by-Step

Inserting a menstrual disc involves pinching the disc into a narrow shape, sliding it along the back wall of the vaginal canal, and tucking the front rim behind the pubic bone so it sits in the vaginal fornix, the wider space around the cervix. The technique feels unfamiliar the first time, but it becomes significantly easier with practice, and understanding the anatomy involved makes the whole process less mysterious.

What a Menstrual Disc Looks Like and How It Differs from a Cup

A menstrual disc is a flexible, bowl-shaped device with a thin rim and a soft collection basin. Unlike a menstrual cup, which sits lower in the vaginal canal and relies on suction to stay in place, a disc sits higher up, tucked horizontally behind the pubic bone. The rim is usually made of silicone or a polymer blend and can be squeezed down to a much narrower profile for insertion. Some discs are disposable (designed for single use over one period cycle), while others are reusable medical-grade silicone that can be washed and used for years.

The key anatomical landmark is the vaginal fornix, the pocket of space that surrounds the cervix at the top of the vaginal canal. The disc rests in this area, collecting menstrual fluid directly as it exits the cervix. The front rim hooks behind the pubic bone, which is the hard ridge of bone you can feel if you slide a finger along the front wall of the vaginal canal. That pubic bone ledge is what holds the disc in position, not suction.

Before You Start

Wash your hands thoroughly with soap and water. If you’re using a reusable disc, make sure it has been cleaned according to the manufacturer’s instructions, typically boiled between cycles and rinsed with warm water between uses during the same cycle. Have the disc, some water-based lubricant if you want it, and a towel nearby.

Find a comfortable position. Many people prefer sitting on the toilet, squatting, or standing with one foot up on the edge of the tub or toilet seat. There is no single “correct” posture. The goal is to relax your pelvic floor muscles and give yourself enough room to maneuver. If you’re tense, insertion is harder because the vaginal muscles clench. Taking a few slow breaths before starting genuinely helps.

Step-by-Step Insertion

Squeeze the disc in half so that the rim forms a figure-eight or narrow oval shape. Hold it with the open side facing up, basin side down, between your thumb and forefinger. Some people find it easier to hold the pinched disc with one hand while using the other hand to separate the labia.

Angle the pinched disc so it points slightly down and back, toward your tailbone rather than straight up. This follows the natural angle of the vaginal canal, which tilts toward the lower back. Push the disc in as far as it will go along the back wall, using your index finger to guide it. You’re aiming past the cervix to the back of the fornix.

Once the back rim is fully in, use your finger to push the front rim up and back until it tucks behind the pubic bone. You’ll feel it click or settle into place behind that bony ridge. This is the step that trips up most first-time users: the front rim needs to be tucked snugly behind the bone, not sitting loosely in the canal. If you can still feel the front rim protruding or sitting low, push it further back and up.

After tucking, run a finger around the rim to make sure the disc is open and not folded over on itself. You should feel a smooth, even rim all the way around. The disc should sit high enough that you barely feel it, if at all. If it’s uncomfortable or feels like it’s slipping, it’s probably not tucked far enough behind the pubic bone.

How to Know It Is Seated Correctly

A properly placed disc should be undetectable during normal activities like walking, sitting, and exercising. You should not feel pressure, pinching, or a sense that something is about to fall out. If the disc feels like it’s sliding down, try reinserting it with a more aggressive tuck behind the pubic bone. The back edge should sit as deep as possible in the posterior fornix, and the front edge should be firmly lodged behind the bone.

Leaking is the main signal that something is off. A small amount of residual blood around the rim after insertion is normal and not the same as a leak. Actual leaking, where fluid continues to come out during wear, usually means one of three things: the disc isn’t fully open, the front rim isn’t tucked behind the pubic bone, or the disc has shifted because it’s the wrong size for your anatomy. Some brands now offer different rim diameters to accommodate the natural variation in fornix size.

Removal

Removing a menstrual disc is messier than removing a cup, and knowing this ahead of time makes the first attempt less alarming. Sit on the toilet. Hook your index finger under the front rim, right behind the pubic bone. Pull the front rim down and out, keeping the disc as level as possible to avoid spilling. Tilting it forward as you pull will help you maintain control of the contents.

Some people find that bearing down gently with their pelvic muscles pushes the disc lower and makes hooking the rim easier. If you’re having trouble reaching it, try a deeper squat or change positions. The disc cannot get “lost” inside you; the cervix blocks it from going any further, and the vaginal canal is a closed space. If the disc feels high, relaxing and bearing down will bring it within reach.

Once removed, dump the contents into the toilet, rinse the disc with warm water if reusable, and reinsert. If disposable, wrap it in toilet paper or its wrapper and throw it in the trash. Do not flush menstrual discs.

The Learning Curve Is Real but Short

If you struggle with insertion the first few times, you’re in good company. A qualitative study of college students trying reusable menstrual products found that while many participants struggled with disc insertion initially, the difficulty improved with subsequent uses.¹ Most people report that by the second or third cycle, insertion and removal feel routine.

The most common stumbling block is the tuck. Pushing the disc in far enough is usually intuitive, but that last motion of tucking the front rim behind the pubic bone requires a deliberate upward push that feels counterintuitive until your fingers learn the motion. Practicing insertion and removal during lighter flow days, when there’s less mess to worry about, can lower the stakes while you build the muscle memory.

Using a water-based lubricant on the rim can make a significant difference, especially when you’re new to discs. It reduces friction and lets the disc glide into position more easily. Silicone-based lubricants can degrade silicone discs over time, so stick with water-based options for reusable models.

What Is Auto-Dumping

Auto-dumping (sometimes called “self-emptying”) is a feature unique to menstrual discs. When you bear down with your pelvic floor muscles, as you naturally do when using the toilet, the front rim of the disc can dislodge slightly from behind the pubic bone. This allows the collected fluid to spill out into the toilet. When you stand up and your muscles relax, the rim reseats itself behind the bone.

This means you can partially empty the disc without removing it, which extends wear time and reduces the number of full removals needed per day. Not everyone experiences auto-dumping consistently. It depends on individual anatomy, disc fit, and how strongly the pelvic floor engages during toileting. Some people find it happens every time they sit on the toilet, while others never experience it. Neither scenario is a problem; it’s just a side effect of how the disc interacts with pelvic floor movement.

If you find that your disc auto-dumps at inconvenient times, like during exercise or sneezing, the disc may be too small or not tucked firmly enough. A firmer rim or a slightly larger diameter can help keep the front edge more securely anchored.

Wearing a Disc During Penetrative Sex

One of the most frequently cited advantages of menstrual discs over cups is that they can be worn during penetrative vaginal sex. Because the disc sits high in the fornix and lies flat against the cervix, it stays out of the way of the vaginal canal. Most partners cannot feel the disc, or can feel it only faintly. The disc is not a contraceptive and does not prevent pregnancy or sexually transmitted infections.

Research exploring attitudes toward menstrual discs in the context of sexual activity found that after being introduced to the product, a majority of male participants expressed positive sentiments, viewing discs as a safe, hygienic option that could improve sexual experiences during menstruation.² In practical terms, the disc reduces visible blood during sex, though some leaking around the rim is still possible, especially during vigorous activity. Laying down a towel is still a reasonable precaution.

After sex, check that the disc is still seated properly. Penetration can shift the rim slightly, and re-tucking the front edge may be necessary. If you notice increased leaking after sex, remove the disc, empty it, and reinsert from scratch rather than trying to adjust it in place.

Troubleshooting Common Problems

A few issues come up repeatedly for new and experienced disc users alike.

Persistent leaking: Almost always a fit or placement issue. Try a different size if available. Some brands run narrower or wider, and since vaginal fornix dimensions vary between individuals, one brand’s fit may work where another doesn’t. Also verify the disc is fully open after insertion by running a finger around the rim.
Difficulty reaching the rim for removal: Bear down firmly, change positions (a deep squat works well), and try hooking the rim from a slightly different angle. If you’ve trimmed your nails short and still can’t get a grip, some reusable discs have a small tab or notch on the rim specifically to help with removal.
Cramps or pressure during wear: A disc that’s too firm or too large for your anatomy can press on the vaginal walls or bladder. If you feel urinary urgency or pelvic pressure you don’t normally have during your period, try a softer or smaller disc. Some people also find that certain disc shapes work better with a tilted or low cervix.
The disc “disappearing” upward: It hasn’t gone anywhere dangerous. The vaginal canal is a closed space. Relax, bear down, and reach in with a finger. If you’re panicking and can’t relax enough, wait a few minutes and try again. Warm water or a warm bath can help relax the pelvic floor.

Cervix Height and Choosing the Right Disc

Your cervix height changes throughout your menstrual cycle, typically sitting lower during menstruation and higher during ovulation. This matters for disc fit because a very low cervix can push the disc downward, making it harder to keep tucked behind the pubic bone. If you find that the disc works well on some days but leaks or feels unstable on others, cervical movement during your cycle is a likely explanation.

To check your cervix height, insert a clean finger into the vaginal canal during your period and note how far in you have to reach before you feel the cervix, which feels like a firm, rounded nub, somewhat like the tip of a nose. If you can feel it at the first knuckle, you have a low cervix. If you can barely reach it with your full finger, it’s high. People with a very low cervix during menstruation sometimes find discs frustrating because the disc doesn’t have enough room to sit properly in the fornix. In those cases, a smaller, more compact disc designed for low cervixes, or switching to a menstrual cup that sits lower in the canal, may be more practical.

Wear Time and Capacity

Most menstrual discs are rated for up to twelve hours of continuous wear, which is longer than the typical recommendation for tampons. The disc’s basin shape gives it a higher fluid capacity than most cups or tampons, generally holding the equivalent of several tampons’ worth of fluid. Exact capacity varies by brand and size, ranging roughly from 30 milliliters on the smaller end to over 70 milliliters for larger models.

On heavy flow days, you may need to empty the disc more frequently than every twelve hours. Auto-dumping, if it happens for you, can extend the interval between full removals. On lighter days, the disc can often go the full twelve hours without issue. Pay attention to how quickly the disc fills during your first few cycles so you can calibrate your own timing rather than relying solely on the manufacturer’s maximum.

Cleaning and Hygiene for Reusable Discs

Between uses during the same cycle, rinse the disc with warm water. Soap is optional mid-cycle but avoid anything heavily fragranced, as it can irritate vaginal tissue. Between cycles, sterilize the disc by boiling it in water for several minutes, following the manufacturer’s guidance on exact duration. Some people use a dedicated small pot or a microwave sterilizer designed for menstrual products.

Avoid storing a reusable disc in an airtight container while damp, which can encourage bacterial growth. A breathable cotton pouch or an open container in a clean drawer works well. Inspect the disc periodically for tears, discoloration, or changes in texture. Silicone is durable, but any visible damage to the rim or basin means it’s time to replace it. Most manufacturers estimate a reusable disc lasts several years with proper care, though there’s no hard expiration date for medical-grade silicone.

Disposable discs skip most of this maintenance. They come individually wrapped, are used for up to twelve hours, and are thrown away. The trade-off is ongoing cost and waste versus the upfront investment and minimal maintenance of a reusable model. Many people try a box of disposable discs first to see if they like the format before committing to a reusable one, which is a reasonable approach given the learning curve involved.