Protecting your bed and sofa on heavy nights

Some nights are heavier than others. In reader forums, people describe crib-mattress liners, washable bed mats and pyjamas kept just for those nights. This Column reports those habits, and what makers and health authorities say about each format at night. It is for everyone who menstruates and has ever checked the sheet in the morning. It does not choose a format for you, and it takes no position on any product at night.

First, a sign worth knowing

Two of these can show up at night: needing to change during the night, and needing “more than one pad at a time” (the NHS says “2 types of period product together”). If they sound like your nights, that is a conversation for a healthcare provider, not for a Column. This is where the Editor stops and a healthcare provider begins.

The SOGC also points to the Self-BAT, a bleeding questionnaire you can fill in yourself, on the Let’s Talk Period website. “How heavy is heavy? Reading your own flow.” goes further.

Each format at night, briefly

One short note per format, in the fixed order. The full detail, with dates, is in “How to sleep on your period: every format, overnight”.

Period pads & liners. Longer, wider period pads are sold as “overnight”. That word is each maker’s own; no Canadian standard defines it. The pack’s length and width, and the maker’s own description, are what to read.

Tampons. Health Canada says: “Change your tampon every 4 to 8 hours, and do not use tampons overnight.” (page modified 2015-02-12). The US FDA’s consumer pages say: “Change each tampon every 4 to 8 hours. Never wear a single tampon for more than 8 hours at a time.” They do not mention overnight use. An FDA draft guidance from October 2025, not in force, proposes a label warning against overnight use. France’s ANSES and other voices are in the plate in “How to sleep on your period”. Periodica takes no position.

Cups. The instructions for your own cup give its wear time. The Canadian maker’s guide the Editor read does not mention sleep. France’s ANSES page covers cups in its night-time pack advice (see the plate in “How to sleep on your period”), and HealthLink BC and the National Defence guide name cups, above.

Discs. The instructions for your own disc give its wear time. ANSES counts discs among internal products (see the plate in “How to sleep on your period”). The Editor found no Canadian page that names discs at night.

Period underwear. The instructions for your own period underwear give its wear time. The US Office on Women’s Health says period underwear “can usually last about a day, depending on the style and your flow”; it does not mention nights. Readers describe sleep-short and boy-short cuts.

Reusable period pads. The Editor found no maker or regulator instruction about nights. Sizes and absorbency words are each maker’s own, so the maker’s instructions come first.

Comfort & care. What readers put on beds and sofas is next.

Under you: beds and sofas

In reader forums, people describe what they put between themselves and the mattress or the sofa:

• crib-mattress liners under the sheet;
• washable absorbent mats made for children’s bedwetting, on beds and sofas;
• incontinence bed pads (sometimes sold as underpads);
• pyjamas kept just for period nights;
• sleep shorts, or compression or bike shorts over a period pad to hold it in place.

These are readers’ habits, not tested advice. The Editor has not checked any of them, and makes no claim about what any of them does.

Layering. Some readers describe wearing two products at once on their heaviest nights. The National Defence guide says: “A combination can be worn for added protection from leaks.” Please read that next to the SOGC’s sign, in the box above: “Needing to wear more than one pad at a time to control menstrual flow.” Both are true at once. Layering is a habit, and needing it can also be a sign worth a conversation with a healthcare provider.

Sleep position. Some side sleepers describe blood moving past a period pad. The Editor found no health source on sleep positions, so this Column gives no position advice.

Life stages. Readers in perimenopause describe “flooding”. That stage has its own Column: “Perimenopause periods: flooding, skipping and everything between”.

Layering is a habit, and needing it can also be a sign worth a conversation with a healthcare provider.

After a leak

It happens. What care labels and makers say about cleaning blood from sheets, mattresses, sofas and clothes, and Health Canada’s rules for using cleaning products safely, are in “Getting blood out: sheets, mattresses, sofas and clothes”.

What this is not

This Column reports what makers and health authorities say about nights, in their own words, and what readers describe putting on beds and sofas. It did not test any product or compare brands. It does not say which format to wear at night, it takes no position on tampons at night, and it makes no claim about what any mattress protector, mat or towel does.

Next in this series: “The surprise-period kit: school, work, car, locker”.