How often should you change a tampon?
Change your tampon every 4 to 8 hours, and never leave one in for more than 8 hours, according to the FDA. Use the lowest absorbency that handles your flow: if a tampon lasts a full 8 hours without needing a change, it's too absorbent. Only use tampons while you're bleeding, and switch to a pad if you'll sleep longer than 8 hours.
The 4 to 8 hour rule, and why it matters
The main reason for the time limit is toxic shock syndrome (TSS), a rare but serious illness caused by bacterial toxins. The risk goes up with higher absorbency and longer wear. TSS from tampons is much rarer than it was in the 1980s, thanks to safer materials and standard absorbency labels, but sticking to the guidance keeps it that way. Read more in what is toxic shock syndrome.
Choosing the right absorbency
In the US, tampon absorbency is standardized by how many grams of fluid they hold. Brands must use these labels, so a "regular" is the same everywhere.
| Label | Holds about | Typical use |
|---|---|---|
| Light / junior | 6 g or less | Light days, first tampons, teens |
| Regular | 6 to 9 g | Most medium days |
| Super | 9 to 12 g | Heavy days |
| Super plus | 12 to 15 g | Very heavy days |
| Ultra | 15 to 18 g | Rarely needed; ask a doctor if you use these often |
Too absorbent: it's dry, hard to pull out, or lasts all 8 hours. Not absorbent enough: it leaks or is soaked well before 4 hours. Most people need different sizes on different days of their period.
Can you sleep with a tampon in?
Only if you'll be in bed for less than 8 hours. Put in a fresh tampon right before sleep and change it as soon as you wake. If you usually sleep longer, use an overnight pad, period underwear or a menstrual cup, which many brands allow for up to 12 hours. See how to stop period leaks at night.
More tampon safety tips
- Wash your hands before and after inserting.
- Use tampons only during your period, not for discharge.
- Remove the last one when your period ends. A forgotten tampon causes a strong smell and discharge; a doctor or nurse can remove it easily.
- Set a phone reminder if you tend to forget.
- Alternate with pads on light days to give your body a break.
Take out your tampon and get emergency care if you develop a sudden high fever (102掳F or higher), vomiting or diarrhea, dizziness or fainting, or a sunburn-like rash during or just after your period. Also see a doctor if you soak through a super tampon every 1 to 2 hours: that's heavy bleeding.
Frequently asked questions
What happens if you leave a tampon in for 10 hours?
Most of the time nothing serious, but it raises the risk of TSS. Take it out as soon as you remember and watch for fever, rash or feeling unwell.
Can you leave a tampon in for 2 hours?
Yes, if it's full. If it's dry after 2 hours, use a lower absorbency next time, since dry tampons can be uncomfortable to remove.
Do I need to take my tampon out to pee?
No. Tampons sit in the vagina, not the urethra. Hold the string aside if you like.
Is it okay to use tampons as a teenager?
Yes, from your very first period. Start with light or slim tampons. See how long a first period lasts.
Sources
- FDA: The Facts on Tampons and Tampon Safety
- NHS: Toxic shock syndrome
- Cleveland Clinic: Toxic Shock Syndrome
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
What is toxic shock syndrome (TSS)?Toxic shock syndrome is rare but serious. Learn the TSS symptoms, how tampons and cups are linked, and the FDA rules on change times and absorbency.How often should you change your pad?How often should you change your pad? Every 3 to 4 hours as a rule, sooner on heavy days. Overnight pads, signs it's time, and when it means heavy flow.Menstrual cup vs tampon: which is better for you?Menstrual cup vs tampon: how they compare on leaks, wear time, TSS risk, cost and comfort, based on research, so you can pick what suits your period.
How do you stop period leaks at night?How to stop period leaking at night: the right overnight products, how to layer them, sleeping positions that help, and when night leaks mean heavy periods.
First period kit checklist: what to pack for schoolA first period kit checklist for school bags and home: what to pack, which pads to choose, what to say to your child, and small comforts for day one.
Period calculator: when is my next period?Free period calculator: enter the first day of your last period and your cycle length to see your next 6 periods. Private, instant, nothing is stored.