Painful Periods Are Common. Disabling Pain Shouldn’t Simply Be Endured.
If your period brings more than mild discomfort, you are not imagining it, and you are not alone.
Many people experience:
- cramping across the lower belly
- pain that spreads into the back or thighs
- nausea
- diarrhoea
- headaches
- dizziness
- tiredness that makes it hard to function
- needing to miss work, school or time with friends
The medical name for painful periods is dysmenorrhoea (say: dis-men-o-REE-ah). It simply means “painful periods” — nothing more mysterious than that.
And here is the important part: common does not mean insignificant. Just because period pain happens to a lot of people does not mean yours does not matter, or that it has to be put up with quietly.
The Science Behind the Cramp
Understanding what is actually happening in your body can make period pain feel less confusing — and less frightening.
- Each month your uterus builds up a soft lining, in case a pregnancy happens.
- If there is no pregnancy, that lining is not needed, so your body sheds it — this is your period.
- To help push the lining out, the uterus squeezes, or contracts.
- These contractions are triggered by natural chemicals called prostaglandins.
What are prostaglandins?
Natural chemicals your body makes that cause the uterus to tighten so it can shed its lining. Higher levels can mean stronger contractions — and stronger contractions briefly reduce blood flow to the uterine muscle, a little like a muscle working hard and tightening again and again.
Why other symptoms appear:
- diarrhoea
- nausea or vomiting
- headache and sweating
- back pain, or pain running down the thighs
Prostaglandins are a normal part of how the uterus works. They are not a sign that something is wrong with your body — but higher levels are one reason why period pain can feel more intense for some people than others.
Not All Period Pain Is the Same
Doctors sometimes describe period pain as either primary or secondary. Knowing the difference can help you describe your experience more clearly.
Primary period pain:
- usually starts within the first few years after periods begin
- tends to occur just before or during bleeding
- usually lasts around one to three days
- comes from normal uterine contractions and prostaglandins
- is not linked to another underlying pelvic condition
Secondary period pain:
- may be linked with an underlying condition
- can begin later in life, after previously manageable periods
- may get worse over time
- can start before bleeding and continue after it ends
- may occur at other times in the cycle
- may come with pelvic, bowel, bladder or bleeding symptoms
Primary period pain commonly begins within a few years of your first period, while secondary pain may sometimes be linked with conditions such as endometriosis or adenomyosis.
When It Is Time to Ask for Help
You do not need to wait until things feel unbearable. These are signs worth raising with a doctor.
- pain that stops your normal daily activities
- regular time off school or work because of pain
- pain that keeps getting worse over time
- pain starting several days before your period
- pain continuing after bleeding has ended
- pain between periods
- pain during or after sex
- pain when opening your bowels
- pain when urinating
- very heavy bleeding, or bleeding between periods
- difficulty becoming pregnant, if that is something you are trying for
- ongoing pelvic, lower-back or leg pain
- pain not properly controlled by the usual pain relief
- a family history of endometriosis
Severe period pain, pain with sex, pelvic pain, heavy bleeding and difficulty becoming pregnant can all occur with endometriosis — but having one or more of these symptoms does not confirm that diagnosis on its own. Only a proper assessment can do that.
Possible Causes, Explained Simply
These are conditions that can sometimes contribute to painful periods. They are possibilities to be aware of — not a checklist for working out what is wrong with you yourself.
- Endometriosis — tissue similar to the lining of the uterus grows elsewhere in the pelvis. This can lead to inflammation, scarring and pain.
- Adenomyosis — tissue similar to the uterus lining grows into the muscular wall of the uterus itself, which can make periods more painful and heavier.
- Fibroids — non-cancerous growths in the uterus. They can cause pressure, heavy bleeding or pain.
- Pelvic inflammatory disease — an infection affecting the reproductive organs. It needs medical treatment.
- Ovarian cysts — fluid-filled sacs on an ovary. Most are harmless and cause no trouble, but some can cause pain.
- Copper intrauterine device (IUD) — a copper IUD can make some people’s bleeding or cramping heavier, especially in the first few months after insertion.
Your Experience Is Clinical Information
When you see a doctor about period pain, they will usually want to understand your whole picture.
They may ask about:
- when the pain starts, and how long it lasts
- where you feel it
- whether it happens outside your period too
- how heavy your bleeding is, and whether there is clotting
- any bowel or bladder symptoms
- pain during sex
- family history, and any medicines you take
- whether pregnancy is possible
- how the pain affects your daily life
Assessment might include:
- an abdominal examination
- a pelvic examination, where appropriate and always with your consent
- a pregnancy test
- blood tests
- testing for infection
- a pelvic ultrasound
- referral to a specialist
A few important things worth knowing:
- an ultrasound can pick up some causes of pelvic pain
- a normal ultrasound does not automatically rule out or explain away ongoing symptoms
- your own description of your symptoms remains genuinely important medical information
- endometriosis can sometimes be considered — and treated — based on your symptoms and clinical picture, without going straight to surgery
Options Worth Knowing About
There is no single fix that works for everyone. What is right for you will depend on your own symptoms, history and preferences.
- Heat — a heat pack or warm bath can help relax the muscles and ease discomfort.
- Gentle movement — walking, stretching or light activity helps some people manage pain.
- Anti-inflammatory pain relief — ibuprofen or naproxen can reduce prostaglandin-related cramping. They work best taken early, but are not safe for everyone.
- Paracetamol — works differently to anti-inflammatory medicines, and can sometimes be used alongside them under guidance.
- Hormonal treatment — the contraceptive pill, a hormonal IUD and other options can reduce bleeding and pain for some people.
- Treating an underlying cause — if pain relates to endometriosis, adenomyosis or infection, more specific treatment may be needed.
Check with a pharmacist or doctor first if you:
- have stomach ulcers
- have kidney disease
- take blood-thinning medication
- have certain types of asthma
- might be pregnant
- have been told to avoid anti-inflammatory medicines
Appropriate symptom control and further investigation can happen at the same time. Some people also ask about acupuncture, herbal remedies, magnesium or other supplements — evidence for these varies, and safety can depend on your individual health, so discuss them with a qualified practitioner first.
Book an Appointment, or Seek Urgent Care
A period may be uncomfortable, but pain that takes over your life deserves to be taken seriously.
Book an appointment if:
- your pain regularly affects daily life
- your symptoms are getting worse
- your periods have become newly painful
- your bleeding is very heavy
- you have pain outside your period
- you have pain during sex, bowel movements or urination
- your usual pain relief is not helping
- you are concerned about endometriosis, or trying to conceive
Seek urgent care for:
- sudden, severe pelvic or abdominal pain
- pain along with fainting or collapse
- severe pain with vomiting
- heavy bleeding with dizziness, breathlessness or weakness
- pain together with a positive pregnancy test
- fever with severe pelvic pain
- sudden pain on one side only
- symptoms dramatically different from your usual pattern
In an emergency, call Triple Zero (000).
Questions Worth Asking Your Doctor
- Does my pain pattern suggest primary or secondary period pain?
- Could endometriosis, adenomyosis or another condition be involved?
- Do I need an ultrasound, blood tests or a specialist review?
- What is the safest way for me to use pain relief?
- Could hormonal treatment be suitable for me?
- How long should we trial a treatment before reviewing it?