Finding blood in your underwear for the first time can feel confusing. It doesn’t mean anything is wrong, even if it feels sudden. You could be at home, waiting for the school day to end, or totally on your own, wondering what to do first. The first steps are practical: get to a bathroom, use a period product, minimize the leak, and tell someone you trust if you need help. We’ll walk through exactly what to do in each situation, plus what’s normal to expect afterward and the signs that need a doctor’s attention.
On this page
- What does the first period usually look like?
- What should you do as soon as you notice blood?
- How do you put on a pad?
- What if your first period starts when you are home alone?
- What happens if your first period happens at school?
- What should I keep in my first-period kit?
- What period product should I start with?
- How do you stay clean and comfortable during your period?
- What is normal after your first period?
- When to see a doctor?
Key takeaways
- Find a bathroom, clean up, and put on a pad or period underwear. Folded toilet paper can be a short-term backup until you find a proper period product.
- At school, get a pad from the nurse, a teacher, counselor, coach, or front-office staff if you are not carrying one.
- If you are by yourself at home, put on a pad, call or text an adult you trust, and keep your phone close if you are not feeling well.
- Your first period might be light or irregular and may be bright red or dark brown.
- Your periods may not come every 28 days for the first few months.
- Change pads every few hours and tampons every 4 to 8 hours. Wash your hands before and after you change products. Do not flush disposable period products; dispose of them in a trash can.
- Very heavy bleeding, fainting, severe dizziness, or pain that stops you from doing your normal activities deserves medical attention.
What does the first period usually look like?
Your first period is when blood and tissue from the lining of your uterus (womb) exit your body through your vagina. The medical term for a first period is menarche. Your first period usually happens when you are about 12 to 13 years old, but it can happen earlier or later. Not sure whether yours is coming soon? Our puberty quiz can help. Your first period is likely to be just a few drops of blood, and the blood can be bright red or have a reddish-brown color.1
A first period usually lasts 7 days or less.1 Starting your period means pregnancy is biologically possible because your ovaries may release an egg (ovulation), even if early cycles are irregular.1
You’ll notice the first clue when you wipe after using the bathroom, or when you find a stain on your underwear, clothes, or sheets. You might have lower-belly cramps, backache, breast tenderness, a headache, or have no other symptoms.1
What should you do as soon as you notice blood?
You don’t have to guess the whole period in the first five minutes. Concentrate on what’s important now.
- Head to the bathroom: Look at your underwear and gently wipe so you can observe the situation.
- Wear a period product: Pads can be a good first option because they attach to your underwear and they don’t have to go inside your body.
- No pad? Create a temporary backup: Roll clean toilet paper into a thick strip and tuck it into your underwear. Do not insert toilet paper into your vagina. Replace as soon as you can access a period product.
- Tackle a leak: Swap out your panties or bottoms if you can. If not, you can also tie a sweatshirt or jacket around your waist to hide a leak.
- Let somebody you trust know if you are having trouble: This could be a parent or guardian, older brother or sister, another family member, a school nurse, a teacher, or someone else you know.
- Write down the date: The first day of your period is the first day of your cycle.
How do you put on a pad?
Wash your hands, then remove the pad from its wrapper, remove the paper cover from the sticky strip, and place the adhesive portion of the pad on the middle of your underwear. If the pad has wings, fold them around the lower side of your underwear.
If the pad feels too far forward or too far back, move the next one slightly. It may take two or three adjustments to find what feels best.
Change your pad every 3 to 4 hours, or sooner if it feels wet, heavy, uncomfortable, or starts to leak. Fold the pad and put it into its wrapper or toilet paper, and discard it in the trash. Do not flush a pad down the toilet.2
What if your first period starts when you are home alone?
First, head to the bathroom. If you have a pad, put it on. If you don’t have a pad, a few squares of folded-up toilet paper in your pants will ward off any potential staining in the meantime. Look in your bathroom or other typical bathroom cabinet.
Next, text or call a parent, guardian, older brother or sister, other family member, or any other adult you trust. It doesn’t have to be a long chat, just something like, “I think I got my period. Where do I get pads?” If no one is able to come home soon and you’re feeling okay, you can remain where you are and change your toilet paper padding as needed.
If blood has hit your underwear or pajamas, rinse it out with cold water and put on some fresh underwear and clothes. If you’re nervous about bleeding again, darker-colored bottoms might make you more confident about your first few pads.
If cramps do occur, try applying mild heat to your lower back or stomach. A warm shower or a little walking may provide some relief. The American College of Obstetricians and Gynecologists (ACOG) notes that heat and light exercise may help relieve menstrual cramps.1
If you want to take an over-the-counter medicine (medicine that you do not need a prescription to buy) to treat pain, make sure to ask your parent, guardian, pharmacist, or other health care professional what pain medicine you can take and how to take it. Follow the directions on the package.
Most importantly, listen to your body! If you get faint, feel dizzy, grow weak, or start to feel like you are bleeding through your pad too fast, tell an adult you trust now!
What happens if your first period happens at school?
The first steps are usually the same. Go to the restroom first. If you already have a pad in your backpack, put it on and check whether your clothes are stained. If you do not have a pad, folded toilet paper can work temporarily while you find one.
You can also let the school nurse know if there is one. Or a counselor, coach, teacher, or someone in the front office. Don’t make it a big deal; keep it simple: “I just got my period and need a pad.” You can even just say, “It’s my first period,” if you want.
If you leaked onto your pants or skirt, ask if the nurse or office can provide you with spare clothes or if you can go home to change. Tie a sweater around your waist to hide the stain until you can. If you have sufficient privacy, rinse the fabric in cold water.
You do not have to stop attending school just because you have your period. Once you change your pad and you are feeling okay, you can go back to class. If you are feeling very crampy, weak, or faint, or if the amount of blood seems excessive, return to the nurse and call home for help.
What should I keep in my first-period kit?
A small bag or pocket in your backpack can make an unexpected period so much easier. You don’t need a complicated kit. Pack two or three pads or tampons, a fresh pair of underwear, tissues, and a small zip-top bag for stained underwear. If you have space, a pair of dark-colored leggings or shorts is also helpful.
Check your kit occasionally. Make sure the items are still clean and dry, and confirm that your spare underwear and clothes still fit.
| Pack this | Why it helps |
| 2–3 pads or tampons | Gives you enough for several changes. |
| Spare underwear | Useful if blood leaks through. |
| Tissues | Helpful for quick cleanup. |
| Small sealable bag | Hold stained underwear until you get home. |
| Dark leggings or shorts | Gives you a backup if your clothes get stained. |
What period product should I start with?
No rule says you have to use one particular product or another.
- Pads are simple to use while you’re figuring out your flow, because you can see when it’s time to change.
- Period underwear can work for you, and you can prefer it over your regular underwear.
- Menstrual cups are inserted into the vagina and collect menstrual blood rather than absorbing it, and you empty them every 8 to 12 hours. If you choose one, follow the product instructions for insertion, removal, cleaning, and how long to wear it.3
- Tampons are an option, but you don’t have to use one just because your friends do. If you decide to try a tampon, follow the instructions.
The U.S. Food and Drug Administration (FDA) recommends washing your hands before and after inserting your tampon, using the least absorbent tampon, changing it every 4 to 8 hours, and not leaving a tampon in for more than 8 hours.4
Toxic shock syndrome (TSS) is a rare but serious illness that can occur with tampon use. Stop using tampons and seek medical attention immediately if you develop a sudden fever, vomiting, diarrhea, dizziness or fainting, or a rash that looks like a sunburn during your period or soon afterward.4
Eventually, you might try other products and find that you like to wear one at school, something different overnight, or something else entirely when you play sports. You don’t have to have all the answers on the day of your first period.
How do you stay clean and comfortable during your period?
Changing your period product regularly matters more than trying to make your body smell “extra clean.” Maintain good menstrual hygiene. Wash your hands before and after changing your product. The Centers for Disease Control and Prevention (CDC) also recommends that you use unscented products for your period, since fragrances can irritate sensitive skin.2 Wash the outside of your genitals (vulva) with water regularly as part of your normal bathing and showering. There’s no need to clean the inside of your vagina. Your vagina cleans itself, and putting soap, washes, or other products inside can interfere with that.2
Even if you are just learning your flow, leaks can happen. Leaks are not a sign that you had a bad period experience. You may learn that you need a longer pad at school, that your flow is heavier at certain times of the day, or that changing a little earlier is the best way to prevent leaks.
What is normal after your first period?
Your second period might not occur exactly 1 month after your first period. In the first year or so after your periods begin, cycles can be as long as 21 to 45 days, and they tend to become more regular over the next 2 or 3 years.5 The amount and color of your bleeding may also vary from one period to the next. One period might start with a little brown spotting, while the next can start with red blood. You are still figuring out what’s typical for your body, so you don’t need every period to look the same.
Keep track of when your first period started on a very simple calendar (a paper calendar or notebook is just fine). Over time, you’ll begin to recognize your unique pattern. You don’t need to use a period-tracking app unless you want to.
When to see a doctor?
Most first periods can be managed with ordinary period products and help from a trusted adult. A pediatrician, primary care doctor, or OB-GYN (obstetrician-gynecologist) should be involved when the timing, bleeding, or pain falls outside the usual adolescent pattern or interferes with everyday life.15
ACOG also recommends a first check-in with an OB-GYN between ages 13 and 15, even if nothing seems wrong. The first visit may be mainly a conversation, and a pelvic exam usually is not needed unless there is a specific problem.6
- Your first period hasn’t started by age 15, or it’s been about 3 years since your breasts started developing, and you still haven’t had a period.1
- Your periods are usually less than 21 days apart or more than 45 days apart, or you go about 90 days without a period.15
- You’re passing a heavy flow and need to change a pad or tampon every 1 to 2 hours.1
- Your period lasts more than 7 days.1
- Period pain keeps you from attending school, playing sports, sleeping, or participating in other everyday activities.1
- You have a bad smell, irritation, or other new or unusual symptoms in your vaginal area.2
Seek emergency care if:
Frequently asked questions
Yes. You can shower and wash your hair during your period. Taking a regular shower can make you feel more comfortable if you have been sweaty or had a leak.
Brown or reddish-brown blood is normal, especially at the start or end of a period or when your flow is light. Menstrual blood doesn’t always look bright red.
You can pick a trusted adult that you feel safe talking to. Having someone who can help you get supplies or answer practical questions, and who will help you find a doctor if you start to feel unwell, can make your first few periods less scary.
Yes. Put on a fresh one before bed and change it when you wake up, or if it feels wet when you get up.
Yes. Once your body starts releasing eggs (ovulation), pregnancy is possible, even if your periods are still irregular.
Yes. You can swim during your period. A tampon or menstrual cup is usually more practical in the water than a pad, because a pad will absorb water.
It can be a few weeks or more, but the first cycles are often irregular. Keep track of the first day of each period and, over time, you will start to notice your own pattern.
Yes. You can go to school and exercise if you are feeling well. Wear a period product that feels secure, carry an extra one with you, and take a break if cramps or fatigue make it uncomfortable.
Last medically reviewed on
References
Our commitment to accuracy is paramount; we use high-quality sources, including peer-reviewed studies, to support the facts in our articles. Learn more about our Editorial Process.
- American College of Obstetricians and Gynecologists. Your First Period. Updated June 2022. acog.org
- Centers for Disease Control and Prevention. Healthy Habits: Menstrual Hygiene. May 7, 2024. cdc.gov
- U.S. Food and Drug Administration. Menstrual Product Options, Facts, and Safe Use. Updated July 6, 2026. fda.gov
- U.S. Food and Drug Administration (FDA). The Facts on Tampons and Tampon Safety. Last updated on September 15, 2026. fda.gov
- North American Society for Pediatric and Adolescent Gynecology. Your Period. Revised October 2020. naspag.org
- American College of Obstetricians and Gynecologists. Your First Gynecologic Visit. Updated June 2022; last reviewed November 2025. acog.org
- American College of Obstetricians and Gynecologists. Abnormal Uterine Bleeding. Last reviewed August 2025. acog.org
Update history
Our team monitors the health and wellness space to keep articles current.
Current version (October 1, 2026) — Medically reviewed by Dr. Sadaf Iftikhar, MBBS, FCPS. Written by Dr. Aqsa Munir, MBBS.
