Getting your first period is a big milestone, and it's natural to feel curious, excited, nervous or all three at once. The good news is that a little preparation goes a long way. This guide covers what a period is, when it is likely to start and exactly how to be ready.
Key takeaways
- Most people get their first period between ages 10 and 15, usually 2 to 3 years after breasts start developing.
- A first period is often light and may be brown, pink or red.
- Periods are often irregular for the first year or two, which is normal.
- A small period kit in your bag means you'll be ready wherever you are.
- Pads, liners, tampons, period underwear and menstrual cups are all safe options.
What is a period?
Each month, the lining of the uterus thickens to prepare for a possible pregnancy. When no pregnancy happens, the body sheds that lining. It leaves the body as blood and tissue through the vagina. This is a period, also called menstruation.
The whole repeating pattern, from the first day of one period to the first day of the next, is called the menstrual cycle.
When will it start?
There is no exact date, but there are some useful clues.
| Clue | What it means |
|---|---|
| Breasts started developing about 2 years ago | Periods usually follow 2 to 3 years after breast buds |
| Pubic and underarm hair have grown in | You are well into puberty |
| Discharge in your underwear | Often begins 6 to 12 months before a first period |
| You've had a big growth spurt | First periods usually come after the fastest growth |
The average age is about 12, but anywhere from 10 to 15 is common. Your timing may be similar to your mother's or other relatives', if you know when theirs started.
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Ask anonymouslyWhat a first period is like
Everyone's experience is a little different, but here is what is typical:
- Color: brown, dark red, pink or bright red are all normal.
- Amount: often just spotting or a light flow at first.
- Length: usually 2 to 7 days.
- Feelings: some people feel nothing at all, while others notice mild cramps, a sore lower back, bloating, tender breasts or tiredness.
It does not hurt when blood comes out, and you can't lose too much blood from a normal period, even though it can look like more than it is.
Building a period kit
A small kit in your school bag or backpack takes the stress out of being caught off guard. Use a zip pouch and include:
- 2 or 3 pads or liners
- A spare pair of underwear
- A few wet wipes or tissues
- A small plastic bag for anything that needs to go home
- Optional: a dark-colored pair of leggings or shorts
If your period starts unexpectedly and you have nothing with you, a folded wad of toilet paper works in a pinch. School nurses, teachers and office staff keep supplies and are used to helping.
Choosing period products
There is no single best option. Many people try a few and use different ones for different days.
Pads and liners
Pads stick to the inside of your underwear and absorb the flow. They come in different sizes and absorbencies. Liners are thinner and good for light days or discharge. Pads are a simple first choice for many people. Change them every 3 to 4 hours, or sooner if they feel full.
Tampons
Tampons are inserted into the vagina and absorb blood internally. They are great for swimming and sports. Always use the lowest absorbency you need, and change every 4 to 8 hours. Never leave one in for longer than 8 hours, to lower the risk of a rare but serious illness called toxic shock syndrome.
Period underwear
These look like regular underwear but have absorbent layers built in. They can be washed and reused and work well as backup or on lighter days.
Menstrual cups and discs
These are flexible, reusable cups inserted into the vagina to collect blood. They can be worn for up to 12 hours, then emptied and rinsed. Some teens find them take a bit of practice.
Managing cramps and discomfort
Period cramps happen because the uterus tightens to help shed its lining. To ease them:
- Hold a heat pad or warm water bottle on your lower belly
- Take a warm bath or shower
- Do gentle exercise, such as walking or stretching
- Drink plenty of water
- Ask a parent or caregiver about over-the-counter pain relievers such as ibuprofen, which work best when taken at the start of cramps
Tracking your cycle
Marking the first day of each period on a calendar or app helps you spot your pattern over time. In the first years, cycles of 21 to 45 days are common. Tracking also gives your doctor useful information if anything seems off.
When to talk to a doctor
Talk to a doctor if:
- You haven't had a period by age 15, or 3 years after breast development started.
- A period lasts longer than 7 days.
- You need to change a pad or tampon every 1 to 2 hours.
- Periods come more often than every 21 days or less often than every 45 days after the first couple of years.
- Cramps are severe enough to keep you home from school regularly.
- You feel dizzy, faint or very tired during your period.
- You have a sudden high fever, rash or vomiting while using a tampon. Remove it and get medical help right away.
The bottom line
Your first period is a normal, healthy sign that your body is growing up. Packing a simple kit, learning about your product options and knowing what is typical will help you feel calm and prepared. If anything feels confusing or worrying, a parent, school nurse or doctor is a great person to ask.
Frequently asked questions
How do I know my first period is coming soon?
Common signs include breasts that have been developing for about 2 years, pubic and underarm hair, and vaginal discharge that started in the past 6 to 12 months. There is no way to know the exact day.
How much blood will there be?
Usually much less than it looks, around 2 to 5 tablespoons over a whole period. A first period is often light and may look brown or pink rather than bright red.
Can I use a tampon for my first period?
Yes. Tampons are safe for teens at any age once periods start. Choose the lowest absorbency you need and change it every 4 to 8 hours.
Is it normal to skip a month?
Yes. In the first year or two, periods are often irregular, so skipping a month or having cycles of different lengths is common.
Sources & further reading
This guide was written in line with public guidance from the organizations below. It is reviewed regularly; spot an error? Tell us and we'll correct it.
- American College of Obstetricians and Gynecologists — acog.org
- American Academy of Pediatrics (HealthyChildren.org) — healthychildren.org
- NHS — nhs.uk
- Nemours KidsHealth — kidshealth.org
This article is general education, not medical advice. If you're worried about your health or your child's, talk to a doctor or nurse.