Period pain is one of the most common things teenagers deal with, and also one of the most dismissed. You've maybe been told to just push through it. But understanding why it happens changes everything: it helps you treat it properly, and it helps you recognise the difference between normal cramps and pain that deserves a doctor's attention. Let's get into it.

The real reason it hurts — prostaglandins

Here's what's actually happening. During your period, your uterus (womb) needs to contract to shed its lining. To make that happen, it releases natural chemicals called prostaglandins. These trigger the muscle contractions you feel as cramps. The catch: if your body makes higher levels of prostaglandins, the contractions are stronger and the pain is worse. That's the whole mechanism.

This kind of pain, where the period itself is the cause and there's no underlying problem, is called primary dysmenorrhea. It's the most common type in teenagers, and it often shows up once your cycles start releasing an egg each month (which usually begins a year or two after your first period). Teen uteruses can also be a bit more sensitive to prostaglandins, which is part of why these years can be especially crampy.

Sources: Menstrual Disorders in Teens — American Academy of Pediatrics; and Period and Chronic Pain in Teens — Clue. Cramps are caused by prostaglandins; teen uteruses can be more sensitive to them.

And it's incredibly common. Depending on the study, somewhere between half and ninety per cent of teenagers who menstruate get period pain. So if it feels like everyone around you deals with this — they probably do.

Source: Supporting teenagers with period pain — PMC clinical review, 2024. Dysmenorrhoea affects roughly 70–90% of teenagers who menstruate; about a third report marked pain.

Why are period cramps so painful for teenagers?
Most teenage period pain is caused by natural chemicals called prostaglandins, which your uterus releases to help it contract and shed its lining. Higher levels cause stronger contractions and more pain. This is called primary dysmenorrhea, meaning the pain comes from the period itself rather than an underlying problem. Period pain is extremely common in teens, affecting somewhere between half and ninety per cent of those who menstruate.

What actually helps

The good news is that because we know cramps come from prostaglandins, we know what fights them. The most effective option for most people is anti-inflammatory painkillers — ibuprofen or naproxen — because they don't just mask pain, they actually reduce the prostaglandins making it. They work best when you start them at the very first sign of your period (or your pain) and take them with food, on schedule, for the first couple of days. Always follow the dosage on the packet and check with a parent or pharmacist first.

Source: Painful periods in adolescents — PMC / CMAJ. NSAIDs such as ibuprofen and naproxen are first-line, most effective taken with food starting at the first sign of bleeding or pain.

Beyond painkillers, lots of small things genuinely help: a hot water bottle or heat patch on your lower tummy or back, gentle movement like walking or stretching (it sounds counterintuitive when you want to curl up, but it eases cramps), staying hydrated, rest, and warmth in general. Different things work for different people, so it's worth finding your own combination.

"Common" doesn't mean you just have to suffer. Period pain has real causes and real treatments, and you're allowed to take it seriously.
What actually helps with period cramps?
Anti-inflammatory painkillers like ibuprofen or naproxen are usually the most effective because they reduce the prostaglandins causing the pain, especially when started at the first sign of your period and taken with food. Heat (a hot water bottle or heat patch), gentle movement, rest and staying hydrated also help many people. Always follow the dosage instructions and check with a parent or pharmacist, and see a doctor if painkillers don't help.

The line between normal and "get this checked"

This is the most important part. Period pain is common — but common is not the same as something you should just live with, especially if it's severe. Around a third of teenagers who menstruate miss school because of period pain, and that level of disruption is a reason to see a doctor, not a reason to push harder.

There's another reason to take severe pain seriously. Teenagers can have conditions like endometriosis (where tissue similar to the womb lining grows outside the uterus), which causes a different, often more intense kind of pain called secondary dysmenorrhea. It's frequently missed for years because people assume bad period pain is just normal. A family history of endometriosis or very severe period pain makes it more worth asking about. You don't need to diagnose yourself — you just need to know that severe pain is always worth raising.

Sources: No more 'just deal with it' — Stanford Medicine; Supporting teenagers with period pain — PMC, 2024. Teenagers can have endometriosis; pain disrupting life is worth evaluating.

There's even early research suggesting that taking teenage period pain seriously matters for the long term: one large UK study found that 15-year-olds with moderate to severe period pain were significantly more likely to report chronic pain years later — which is all the more reason not to ignore it now.

Source: Period and Chronic Pain in Teens — Clue, citing a UK longitudinal study.

See a doctor if…

  • Your pain isn't helped by ibuprofen or naproxen taken correctly
  • The pain is severe enough to keep you home from school or stop your normal activities
  • Your cramps get worse each year rather than easing
  • Pain starts days before bleeding or lasts the whole period
  • You have pain outside of your period, or very heavy bleeding (soaking a pad or tampon every hour, or large clots)
  • There's a family history of endometriosis or severe period pain
Is it normal for period pain to make me miss school?
Period pain is common, but pain severe enough to regularly keep you home from school is a sign to see a doctor, even though many teens experience it. Around a third of menstruating teens miss school because of period pain. Common does not mean you simply have to suffer through it — there are treatments that help, and pain that disrupts your life is always worth getting checked.
When is period pain a sign of something more serious?
See a doctor if your pain isn't helped by anti-inflammatory painkillers, gets worse each year, starts days before bleeding or lasts the whole period, happens outside your period, or comes with very heavy bleeding. Teenagers can have conditions like endometriosis, so persistent or severe pain should always be taken seriously and evaluated rather than dismissed.

Understanding your cycle also helps you predict and prepare for the painful days, so they catch you off guard less. If your periods are still all over the place, our guide on why teenage periods are so irregular explains why — and tracking your cycle, even loosely, helps you know when to have your heat patch and painkillers ready.

About the author

Andreea Mighiu is a women's hormonal health educator and the founder of Zōē. She works alongside medical doctors to translate research into clear, friendly education about the menstrual cycle. She is an educator, not a physician — this article is here to inform and reassure, never to replace advice from your doctor or a trusted adult.

References

1. Menstrual Disorders in Teens. American Academy of Pediatrics, HealthyChildren.org. healthychildren.org
2. Supporting teenagers with period pain in general practice: clinical review. PMC, 2024. pmc.ncbi.nlm.nih.gov
3. Painful periods in adolescents. CMAJ / PMC. pmc.ncbi.nlm.nih.gov
4. No more 'just deal with it': Helping teens have easier periods. Stanford Medicine, 2023. med.stanford.edu
5. Period and Chronic Pain in Teens. Clue. helloclue.com

This article is educational and written for general reassurance. It is not medical advice, and medication should only be taken as directed on the packet and with the okay of a parent, pharmacist or doctor. If your period pain is severe or worrying, please see a doctor.