Sanitary pads are widely used menstrual products. If you're new to periods, helping someone else understand theirs, or simply curious about how these everyday hygiene products work, this guide breaks it down clearly — what sanitary pads are, how they're built, the different types available, and how to use them.
What Is a Sanitary Pad?
A sanitary pad is an absorbent hygiene product worn during menstruation to absorb period blood and help reduce the risk of leaks. It sticks to the inside of your underwear and stays in place through the day, offering a simple, external way to manage your period without anything worn internally.
How Do Sanitary Pads Work?
Most sanitary pads are built with three main layers, each with a different function.
Top Layer
This is the layer that touches your skin directly. It's typically designed to allow menstrual fluid to pass into the absorbent layers beneath it.
Middle Layer (Absorbent Core)
This is the main working layer of the pad, designed to absorb and hold liquid. The thickness and material of this core is usually what distinguishes a regular pad from a heavier, overnight one.
Bottom Layer
The bottom layer is designed to be leak-resistant, which is intended to help reduce the chances of blood passing through to clothes or bedsheets.
On the back of the pad, an adhesive strip is meant to keep it in place against the underwear, while wings (on many pad designs) fold around the sides for additional hold.
Types of Sanitary Pads
Regular pads are intended for everyday flow days — usually moderate in length and thickness.
Overnight or heavy-flow pads are typically longer, with a higher-absorbency core, designed for nighttime use or heavier flow days. As with any pad, they should still be changed based on your flow and the manufacturer's guidance, rather than left on for a fixed stretch of time regardless of how full they are.
Panty liners are thinner pads intended for light discharge or spotting, rather than regular period flow.
Choosing between these usually depends on your flow on a given day, the time of day, and your personal comfort preferences.
How to Use a Sanitary Pad
There is no single fixed schedule for changing a sanitary pad. How often you need to change it depends on your menstrual flow, the product's absorbency, and the manufacturer's instructions.
Washing your hands before and after changing your pad is a simple hygiene habit worth following.
Wrap the used pad, usually in the wrapper of the new one or a disposal bag, before placing it in a bin. Sanitary pads should not be flushed down the toilet, as they do not break down like toilet paper and can cause blockages.
If you experience ongoing irritation, discomfort, or notice a change that concerns you, it's a good idea to speak with a healthcare professional rather than self-diagnosing the cause.
Choosing the Right Sanitary Pad for You
Material is one thing to consider — pads are available in different materials and designs, depending on the brand and product. Material preference often comes down to individual comfort and skin sensitivity; what suits one person may not suit another, so it can help to try a couple of options rather than assume one material will automatically work better for you.
Flow level matters too — lighter pads may suit regular days, while heavier or overnight pads are designed with additional absorbency in mind, though they still need to be changed based on flow rather than worn for a set number of hours regardless.
Comfort, including softness, breathability, and fit, can vary between brands and product ranges, so trying a couple of options can help you find what works for your body.
Budget and environmental impact are also worth factoring in if sustainability or biodegradability matters to you when choosing a product.
There's no single "best" pad for everyone — it often comes down to trying a few options and paying attention to what feels comfortable and works well for your body and flow.
A Note on General Hygiene
Alongside regular pad changes, general hygiene habits — such as washing your hands before and after changing a pad and keeping the genital area clean during your period — are commonly recommended as part of everyday period care. If you have specific questions about products, skin sensitivity, or hygiene routines during your period, a healthcare professional can offer guidance suited to your individual needs.
Frequently Asked Questions About Sanitary Pads
What is a sanitary pad used for?
A sanitary pad is used to absorb menstrual blood and help reduce the risk of leaks during periods. It's worn inside the underwear, external to the body.
How often should you change a sanitary pad?
There is no single fixed schedule for changing a sanitary pad. How often you need to change it depends on your menstrual flow, the product's absorbency, and the manufacturer's instructions.
What are the different types of sanitary pads?
The main types of sanitary pads are regular pads for everyday flow, overnight or heavy-flow pads for nighttime and heavier days, and panty liners for light discharge or spotting — though all should be changed based on flow rather than a fixed schedule.
Can you flush sanitary pads down the toilet?
No, sanitary pads should not be flushed down the toilet. They do not break down like toilet paper and can cause blockages in plumbing systems. It's recommended to wrap and dispose of them in a bin.
How do I choose between cotton, organic, or other pad materials?
The right material often comes down to individual comfort and skin sensitivity rather than one type being universally better. Some people find certain materials more comfortable than others, so trying a few options can help you find what suits your body.
In Summary
Sanitary pads remain one of the most accessible period products available, and understanding how they're designed can make choosing between options a little easier. Whether you're considering a regular pad for daily use or an overnight option for heavier days, your own flow, comfort, and hygiene routine should guide your choice — and a healthcare professional is the right person to speak with if you have specific concerns.
TIME offers sanitary pads across regular, heavy-flow, and overnight options, giving you a range to explore as you find what works best for your body and your day.
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