Secondary dysmenorrhoea

Overview

Secondary dysmenorrhoea is painful periods caused by an underlying medical condition in the reproductive organs. Unlike primary dysmenorrhoea (normal menstrual cramps that start soon after a girl begins her period), secondary dysmenorrhoea often begins later in life and may get worse over time. The pain is due to something else going on in the womb, ovaries, or pelvis.

It is less common than primary dysmenorrhoea, but still affects many people with a uterus. Experts estimate that about 10% of people with painful periods have secondary dysmenorrhoea.

It mainly affects women and people assigned female at birth who are in their 30s and 40s. It is rare in teenagers, but can occur at any age if an underlying condition develops.

Symptoms

Common symptoms

• Pelvic pain that starts before your period and may last throughout
• Pain that gets worse over time or changes in character
• Pain during or after sex
• Heavy or prolonged menstrual bleeding
• Bleeding between periods
• Pain with bowel movements or urination during your period

Symptoms in children

• Secondary dysmenorrhoea is rare in children, but if a teenager has severe pelvic pain that does not improve with over-the-counter pain relievers, it could be a sign of a structural problem (like a blockage). Symptoms would be similar to adults.

Symptoms in older adults

• In older adults (over 40), the pain may be linked to fibroids, adenomyosis, or endometriosis. It can also be part of the perimenopause transition. Symptoms are similar, but bleeding may become heavier or irregular.

Causes

Main causes

• Endometriosis – tissue similar to the womb lining grows outside the womb, causing inflammation and pain.
• Uterine fibroids – non-cancerous growths in the womb that can cause pain and heavy bleeding.
• Adenomyosis – the womb lining grows into the muscle wall of the womb, causing pain and heavy periods.
• Pelvic inflammatory disease (PID) – an infection of the reproductive organs, often from an STI.
• Ovarian cysts – fluid-filled sacs on the ovaries that can cause pain during menstruation.
• Intrauterine device (IUD) – a contraceptive device that can sometimes cause cramping, especially in the first few months.

Risk factors

• Age between 30 and 40
• Never having given birth
• A history of pelvic infections or sexually transmitted infections
• Family history of endometriosis or fibroids
• Having an IUD placed for contraception

When to see a doctor

See a doctor urgently if:

• If you have sudden severe pain or heavy bleeding as listed in the emergency section, call your local emergency number or go to emergency care.
• If you have fever with pelvic pain, see a doctor urgently as this could be an infection.

Book a routine appointment if:

• If your period pain is getting worse over time, or if it interferes with work, school, or daily life.
• If you have new pain after years of normal periods.
• If you have bleeding between periods or after sex.
• If you are concerned about any change in your menstrual cycle.

Diagnosis

Your doctor will start by asking about your symptoms, menstrual history, and any other health problems. They will then do a gentle pelvic exam to check for tenderness or lumps. Based on the findings, they may recommend tests to look for the cause.

Tests that may be done

• Pelvic ultrasound – a scan that uses sound waves to create images of your womb, ovaries, and pelvic area.
• MRI scan – gives more detailed images if needed.
• Laparoscopy – a small camera inserted through a tiny cut in your belly to look directly at the pelvic organs. This is often used to diagnose endometriosis.
• Blood tests – to check for infection or other conditions.
• Hysteroscopy – a camera inserted through the vagina and cervix to look inside the womb.

What to expect at your appointment

First, you will have a detailed conversation with your doctor about your symptoms. The pelvic exam is usually quick and may feel a little uncomfortable but should not be very painful. If a test like an ultrasound is needed, it is painless (often done with a probe on your belly or inside the vagina). You may be referred to a gynecologist (a specialist in women's health) for further evaluation.

Treatment

Treatment for secondary dysmenorrhoea depends on what is causing the pain. The goal is to address the underlying condition and relieve your symptoms. Your doctor will discuss options that are safe and right for you.

Self-care at home

• Place a warm heating pad or hot water bottle on your lower belly (with a cloth barrier to avoid burns).
• Take warm baths to relax muscles.
• Use over-the-counter pain relievers like ibuprofen (ask your pharmacist for advice on the best type for you).
• Light exercise, such as walking or stretching, can increase blood flow and reduce pain.
• Try relaxation techniques like deep breathing or meditation to manage discomfort.

Medical treatments

Depending on the cause, your doctor may recommend hormonal treatments to regulate or suppress your periods. These include combined oral contraceptives (the pill), progestin-only pills, hormonal patches, or a hormonal intrauterine system (IUS). Non-hormonal anti-inflammatory medicines can also help. For some conditions, hormone therapy (like GnRH agonists) may be used temporarily. Always take medicines as prescribed and talk to your doctor about side effects.

When is surgery considered?

Surgery may be an option if the underlying cause is something like fibroids, endometriosis, or ovarian cysts. Procedures can include removal of fibroids (myomectomy), excision of endometriosis tissue, or removal of an ovary or the uterus (hysterectomy) in severe cases. Surgery is usually considered only after other treatments have not worked or if the condition is serious.

Living with this condition

Living with secondary dysmenorrhoea can be challenging, but many people manage well with treatment. Track your symptoms and cycle to identify patterns. Plan ahead for your period – have pain relief ready and schedule lighter activities on heavy pain days. Communicate with your employer or school if you need accommodations.

Lifestyle tips

• Get regular sleep and manage stress – both can affect pain.
• Try gentle yoga or stretching exercises to relax pelvic muscles.
• Use relaxation techniques like mindfulness or breathing exercises.
• Avoid smoking and limit alcohol, as these can worsen pain.

Diet and exercise

A healthy diet with plenty of fruits, vegetables, whole grains, and lean protein can help reduce inflammation. Some people find cutting back on caffeine, salt, and sugar helps. Regular moderate exercise, like walking, swimming, or cycling, can improve overall well-being and may reduce pain over time.

Mental health and emotional wellbeing

Chronic pain can be stressful and may affect your mood, sleep, and relationships. It is normal to feel frustrated or anxious. Talk to your doctor if you feel overwhelmed – they can recommend counselling or support groups. Taking care of your emotional health is just as important as treating the physical symptoms.

Prevention

Not all cases of secondary dysmenorrhoea can be prevented, because many of the underlying causes (like endometriosis or fibroids) are not fully understood. However, reducing your risk of pelvic infections (by using condoms and getting tested for STIs) and treating infections early may help. A healthy lifestyle may also support overall reproductive health.

Vaccines

The HPV vaccine can prevent certain infections that may lead to cervical changes, but it does not directly prevent the common causes of secondary dysmenorrhoea like endometriosis or fibroids. Still, it is recommended for all eligible individuals.

Screening programmes

Regular gynecological check-ups and Pap smears (cervical screening) can detect some conditions early. If you have symptoms, do not wait for a routine check – see your doctor promptly.

Complications

If left untreated

• Chronic pelvic pain that worsens over time
• Infertility (depending on the underlying cause, such as endometriosis or PID)
• Heavy bleeding leading to anaemia (low iron levels)
• Complications from the underlying condition, such as rupture of an ovarian cyst or spread of endometriosis

Long-term outlook

With proper diagnosis and treatment, most people with secondary dysmenorrhoea find significant relief from pain and improve their quality of life. Many underlying conditions can be managed successfully with medicines or surgery. Early treatment offers the best chance to prevent complications and preserve fertility if desired. While some conditions are long-term, ongoing care and support can help you live well.

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