How Can I Stop Period Leaks at Night?

You wake at 5:40 a.m. and know before you open your eyes. Cold, damp, and a sinking feeling somewhere around your hip. Then comes the stripping of the sheets, and the mental math about how many nights of this are left.

Start with how long you’ll sleep

The number that matters is eight. Cleveland Clinic¹ says you can sleep with a tampon in, with the right absorbency, but not for longer than eight hours. Put in a fresh one right before bed, and change it regularly, about every four to eight hours.

If you’ll sleep longer than eight hours, Cleveland Clinic² says to use a sanitary pad, period underwear or a menstrual cup instead.

Cleveland Clinic³ says a tampon left in too long raises the risk of irritation, infection and toxic shock syndrome (TSS). Its TSS guidance goes further and says to use pads at night and not to leave any tampon in longer than eight hours.

If it’s a tampon that leaks

Absorbency is the dial. Cleveland Clinic⁴ says tampons run from light for low-flow days up to super for heavy bleeding, and to pick the lowest absorbency that fits your flow. Never keep one in longer than eight hours, it says, and four to six hours is better.

A leak can mean the tampon’s absorbency doesn’t match your flow, or that it has been in too long.

If it’s a pad that leaks

Pads come in absorbency levels, and Cleveland Clinic⁴ names “super” and “overnight” options for heavier days. Wings, the adhesive flaps that wrap the sides of your underwear, help keep a pad in place and prevent leaks or bunching, so pick a winged one for sleeping.

Wings keep the pad in place when you move, and you move a lot in your sleep.

Cleveland Clinic¹ lists double-layered pads as an option for heavy flow. The CDC⁵ lists doubling up on pads to control flow as a sign of heavy menstrual bleeding. Both are true. A trick that gets you through the night can also be a symptom, which is worth noticing.

If it’s a cup

A cup can go up to 12 hours before emptying, according to Cleveland Clinic⁶. On heavy days you may need to empty it more often to guard against leaking.

Leaks have a short list of causes. The cup may be inserted wrong. It may be full. Or you may be new to cups: about 10% of new users report leakage, and Cleveland Clinic⁶ says both problems can usually be resolved with a little practice.

If you want a backup layer

Period underwear typically holds somewhere between one and two tampons’ worth of flow, Cleveland Clinic⁷ says, and shouldn’t be worn for more than 12 hours at a time. It can be worn alone or as extra protection alongside tampons, which makes it a handy backup layer.

The play

Try this: pair a primary and a backup

Pick one main product for the night: a fresh tampon right before bed if you’ll be asleep under eight hours, or an overnight pad with wings, or a cup.

Add period underwear as the backup.

Change the main product the moment you wake up.

When the leaks mean heavy bleeding

If you’ve tried the above and you’re still leaking, the product may not be the problem.

The CDC⁵ lists these as signs of heavy menstrual bleeding: changing a tampon or pad in less than 2 hours, flow that soaks through one or more every hour for several hours, doubling up on pads, changing products during the night, periods that last more than 7 days, and clots the size of a quarter or larger. About 1 in 5 women has it. Our article on how to tell if your period is too heavy walks through the causes and the appointment.

Cleveland Clinic’s⁸ pad guide has its own marker: if you’re soaking through regular absorbency pads in an hour or less, talk to a healthcare provider, since it may point to an underlying health condition.

When to get checked

Don’t wait if

1. Emergency

   Go to the ER right away if you soak through two or more pads or tampons an hour for two to three hours in a row. Cleveland Clinic³ says that pattern calls for provider contact or emergency evaluation.

2. Emergency

   Call 911 or your local emergency number if you use tampons or a cup and develop sudden high fever with chills, severe dizziness or fainting, nausea, vomiting or watery diarrhea, or a rash that looks like a bad sunburn. These can be signs of toxic shock syndrome. Cleveland Clinic³ says symptoms happen suddenly and worsen quickly, and TSS needs immediate care.

Book an appointment if any of these fit:

• You change products during the night, or double up, most periods
• You’re soaking through a pad or tampon in an hour or less
• Your periods last more than 7 days, or you pass clots the size of a quarter or larger
• You leak through even with an overnight pad plus a backup

Tonight, put the fresh tampon in right before bed, or reach for the overnight pad with wings. The 5:40 a.m. math gets easier.