Menstrual Products Compared: Pads, Tampons, Cups, Discs and Period Underwear

Pads and period underwear absorb flow outside the body. Tampons, cups and discs collect or absorb flow inside the vagina. All of these are regulated by the FDA as medical devices, but they are reviewed differently, made from different materials, and carry different safety considerations. There is no single product that is best for everyone — the right choice depends on your flow, comfort, budget and health history.

Warning Signs to Act On Right Away

Toxic Shock Syndrome (TSS) is a rare but serious bacterial infection linked to tampon use, especially when a tampon is left in too long. Symptoms include a sudden high fever, chills, nausea or vomiting, diarrhea, a rash, dizziness or fainting, and low blood pressure. If you have any of these symptoms, remove the tampon right away and contact your healthcare provider or go to the nearest emergency room.

Medical Disclaimer: This page is for general education only. It is not medical advice, diagnosis, or treatment, and reading it does not create a provider-patient relationship. Talk with a licensed healthcare provider about your specific situation. If you are having a medical emergency, call 911 or go to the nearest emergency room. See our full Medical Disclaimer.

How Each Product Works

Menstrual Pads and Liners

Pads sit inside your underwear and absorb flow outside the body. A liner is a thinner pad, often used for light days or as backup. Interlabial pads sit between the labia as a backup option. Pads come in disposable and reusable versions, and are available in sizes made for light, heavy, or overnight flow.

Period Underwear

Period underwear combines the absorbent material of a pad with the underwear itself. Unlike disposable pads, it is designed to be washed and reused rather than thrown away after one use.

Tampons

Tampons are inserted into the vagina and absorb flow before it leaves the body. They are typically made of cotton, rayon, or a blend of both. Only single-use tampons are authorized by the FDA for sale in the U.S. Reusable tampons have not been authorized and are discouraged, since they may carry a higher risk of infection.

Menstrual Cups and Discs

A menstrual cup — also called a menstrual disc — is a small, flexible device inserted into the vagina to collect menstrual flow. Cups are generally made from silicone or rubber, come in different sizes and shapes, and can be reusable or disposable.

Comparing Absorbency, Material and Reuse

Pads and liners — Absorb outside the body; sizes are matched to flow level rather than a numbered absorbency rating. Made from absorbent material with an adhesive backing; some contain added scents. Disposable or reusable depending on the product.
Period underwear — Absorbs outside the body, built into the underwear itself. Washed and reused rather than discarded after each use.
Tampons — Absorb inside the body. Labeling must state the tampon’s absorbency, and the FDA recommends using the lowest absorbency that manages your flow. Single-use only.
Cups and discs — Collect fluid inside the body rather than absorbing it. Come in different sizes, generally matched to flow level, and are typically reusable for repeated cycles if washed and stored as instructed.

Comparing Cost Considerations

Reusable options like menstrual cups can cost less over time than disposable products, since a single cup can last for years instead of buying new products each cycle. Reusable pads and period underwear work on a similar principle, since they’re washed and used again rather than thrown away. Disposable pads, liners, and tampons are bought new for each cycle. This page doesn’t cover specific prices, since they vary by brand and retailer.

Comparing Safety Evidence

Regulatory review: All menstrual products sold in the U.S. must meet FDA requirements for manufacturing, labeling and adverse event reporting. Tampons go through a more detailed premarket review of material safety, absorbency, and bacterial growth before they can be sold.
Tampons and TSS: Reported TSS cases linked to tampons have dropped significantly over the past 20 years, which the FDA attributes partly to labeling and education efforts. TSS is not a concern with pad use.
Metals in tampons: An independent literature review and an FDA laboratory study both looked at whether metals in tampon materials could be released and absorbed during use. The FDA’s laboratory testing found that while trace metals were present, the amount released was far below levels expected to cause harm.
Cups and discs as one category: The FDA generally treats menstrual discs as a type of menstrual cup, so most published safety information covers cups and discs together rather than as separate categories.
Allergic reactions: Any of these products can cause irritation, itching, rash, or swelling in some people. Anyone with a latex allergy should choose a silicone cup rather than a rubber one.

Extra-Caution Groups

Anyone with a latex allergy should avoid rubber menstrual cups and choose silicone instead.
People who use an IUD should talk with their gynecologist before using a menstrual cup, since removing the cup can sometimes disturb the IUD’s position or strings.
Tampons and menstrual cups are meant for period blood only — they aren’t intended for other vaginal discharge or bleeding, such as from a current infection or recent childbirth. Pads can be used for other discharge if needed.
Anyone sensitive to added scents or dyes may want to avoid scented pads or liners.

Evidence Limits

This page summarizes general FDA and National Institutes of Health information on product types and safety. It does not rank products by performance, does not cover every brand or design on the market, and does not include specific prices, since those change and vary by retailer. It also isn’t a substitute for talking with a healthcare provider about which product fits your body, flow, or health history.

A Quick Decision Path

Do you prefer nothing inserted into the vagina? Consider pads, liners, or period underwear.
Is cost over time a priority? A reusable cup, reusable pads, or period underwear may cost less across many cycles than buying disposable products each month.
Do you have a latex allergy? Choose a silicone menstrual cup, not a rubber one.
Do you use an IUD? Talk with your provider before choosing a menstrual cup.
Are you unsure about absorbency? Start with the lowest tampon absorbency or smaller cup size that manages your flow, and adjust as needed.

Frequently Asked Questions

Which menstrual product is the most absorbent?

There isn’t one product that’s always the most absorbent. Tampons and pads come in different absorbency levels to match your flow, and menstrual cups come in sizes for lighter or heavier days. The right absorbency is the one that matches your own flow, not a fixed ranking across product types.

Are menstrual cups and discs the same thing?

They’re closely related. The FDA describes a menstrual disc as a type of menstrual cup, and most available safety information covers them as one category rather than two separate ones.

Is toxic shock syndrome a risk with pads or cups?

TSS is not a concern with pad use. It’s mainly associated with tampons, especially when left in too long, though it’s rare overall. Follow the product instructions for how often to change or empty any product you use.

Can I use two menstrual products at the same time?

Some people use an internal product, like a tampon or cup, along with an external product, like a pad or liner, for extra protection. Always follow each product’s own instructions, and don’t wear two internal products, like a tampon and a cup, at the same time.

Educational Disclaimer

This article is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. It does not recommend any single menstrual product as best for all readers. Talk with a qualified healthcare provider about which option fits your health history, flow, and preferences.