Menstrual Cramps: Causes, Symptoms, Treatment & When to See a Doctor

The most common cause of menstrual cramps is the release of prostaglandins during menstruation. These chemicals cause the muscles of the uterus to contract so that the uterine lining can be shed during a period. Higher prostaglandin activity can be associated with stronger cramps.

Doctors generally classify menstrual cramps into two types: primary dysmenorrhea and secondary dysmenorrhea.

Primary Dysmenorrhea

Primary dysmenorrhea refers to menstrual pain that is not caused by another pelvic disease. It commonly begins around the time periods start and may occur during the first few days of menstruation.

The pain often feels like cramping or throbbing in the lower abdomen and may spread to the lower back or thighs. Some people may also experience nausea, loose stools, headache or dizziness.

Secondary Dysmenorrhea

Secondary dysmenorrhea occurs when period pain is related to an underlying reproductive or pelvic health condition. It may develop later in life, become progressively worse or last longer than typical menstrual cramps.

Conditions associated with secondary dysmenorrhea include:

• Endometriosis
• Adenomyosis
Uterine fibroids Pelvic inflammatory disease (PID) Certain ovarian conditions Some abnormalities affecting the reproductive tract

If period pain changes significantly, becomes severe or begins interfering with everyday activities, it is worth discussing the symptoms with a gynaecologist.

Endometriosis

Endometriosis occurs when tissue similar to the lining of the uterus grows outside the uterus, commonly around the ovaries, fallopian tubes and other pelvic structures. It can cause painful periods, chronic pelvic pain and pain during intercourse. Some people may also experience bowel or bladder symptoms, particularly around menstruation.

Endometriosis can also be associated with infertility. This does not mean that everyone with endometriosis will have difficulty becoming pregnant, but the condition can affect fertility in some people.

Uterine Fibroids

Fibroids are non-cancerous growths that develop in or around the uterus. Many fibroids do not cause symptoms, but some can contribute to painful periods, heavy menstrual bleeding or pelvic pressure.

The location and size of a fibroid can influence the symptoms it causes. If fibroids are suspected, a doctor may recommend imaging such as an ultrasound.

Adenomyosis

Adenomyosis occurs when tissue that normally lines the uterus grows into the muscular wall of the uterus. It can cause painful periods and may also be associated with heavy menstrual bleeding or an enlarged, tender uterus.

Pelvic Inflammatory Disease

Pelvic inflammatory disease is an infection and inflammation involving the upper female reproductive tract. It can sometimes occur following sexually transmitted infections and may cause pelvic pain, abnormal discharge, fever or pain during intercourse.

Because untreated PID can affect reproductive health, symptoms suggesting an infection should be evaluated promptly.

Cervical Narrowing

Cervical stenosis refers to narrowing of the cervical canal. In some cases, this can interfere with the normal passage of menstrual blood and contribute to painful periods. It is much less common than primary dysmenorrhea and should be evaluated by a healthcare professional when suspected.

Menstrual cramps can vary considerably from person to person. Common symptoms include:

• Cramping or throbbing pain in the lower abdomen
• Pain that spreads to the lower back or thighs
• Pain beginning shortly before or around the start of menstruation
• Pain that is stronger during the first few days of the period
• Nausea
• Loose stools or diarrhoea
• Headache
• Dizziness
• Fatigue
• Abdominal discomfort or bloating

Mild discomfort may not interfere significantly with everyday life. However, pain that regularly prevents you from working, studying, sleeping, exercising or carrying out normal activities deserves medical attention.

A doctor will usually begin by asking about your menstrual cycle and the pattern of your pain.

You may be asked:

• When does the pain begin?
• How long does it last?
• How severe is the pain?
• Has the pain become worse over time?
• Are your periods heavy or irregular?
• Do you experience pain during sex?
• Do you have pain during bowel movements or urination?
• Are you experiencing unusual vaginal discharge or fever?
• Do pain medicines provide relief?

Depending on your symptoms and medical history, a gynaecological examination or ultrasound may be recommended.

Additional investigations may be considered when an underlying condition such as endometriosis, fibroids or adenomyosis is suspected.

Keeping a record of your periods, pain severity, bleeding and other symptoms can also help your doctor understand the pattern.

Treatment depends on the cause and severity of the pain.

Pain-Relieving Medicines

Non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen or naproxen, can help reduce menstrual pain because they reduce prostaglandin production.

These medicines are not suitable for everyone. People with certain stomach, kidney, liver, bleeding or medication-related conditions may need to avoid them. Always follow the product instructions or your doctor's advice before taking medication.

Heat Therapy

Applying a heating pad or hot-water bottle to the lower abdomen or lower back can provide relief for many people. A warm bath or shower may also help relax muscles and reduce discomfort.

Avoid placing very hot objects directly against the skin for prolonged periods.

Regular Physical Activity

Regular physical activity may help some people experience less menstrual discomfort. Walking, cycling, swimming, yoga and other moderate activities can be useful options, depending on individual comfort and health.

Adequate sleep and relaxation techniques may help improve the ability to cope with menstrual pain. Gentle stretching, breathing exercises, meditation and yoga can be used alongside medical treatment when appropriate.

Hormonal contraceptive methods can reduce menstrual pain for some people by changing hormonal activity and, in some cases, reducing or suppressing ovulation and menstrual bleeding.

Options may include tablets, patches, vaginal rings, implants, injections and hormonal intrauterine devices. The appropriate option depends on your medical history, reproductive goals and individual circumstances, so hormonal treatment should be discussed with a healthcare professional.

When menstrual pain is caused by endometriosis, fibroids, adenomyosis, PID or another condition, treatment should address the underlying cause.

Depending on the diagnosis, treatment may include medication, hormonal therapy, antibiotics for certain infections, minimally invasive procedures or surgery.

Period pain should not simply be ignored when it is severe or repeatedly disrupts your life.

Consider speaking with a gynaecologist if:

• Your menstrual pain is severe or getting worse
• Pain prevents you from attending work, school or normal activities
• Your usual pain-relief measures are no longer effective
• Your periods have become much heavier or irregular
• You develop pain between periods
• You experience pain during sexual intercourse
• You have pain while passing urine or having a bowel movement, especially around your period
• You have unusual vaginal discharge or fever
• Severe period pain begins after years of relatively painless periods

Sudden or unusually severe pelvic pain, particularly when accompanied by heavy bleeding, fever, fainting or other concerning symptoms, requires prompt medical assessment.

Menstrual cramps themselves do not necessarily mean that a person has a fertility problem. However, some conditions that cause severe or persistent menstrual pain can also affect fertility.

Endometriosis is an important example. In some people, inflammation and pelvic adhesions associated with endometriosis can interfere with reproductive structures and make conception more difficult.

If you have severe period pain together with difficulty conceiving, painful intercourse, chronic pelvic pain or other concerning symptoms, a fertility or gynaecological evaluation may help identify the underlying cause.

For mild or typical menstrual cramps, you may find the following measures helpful:

• Apply a warm heating pad or hot-water bottle to your lower abdomen.
• Take a warm bath or shower.
• Try gentle walking, stretching or yoga.
• Get adequate sleep, particularly around your period.
• Track your symptoms and menstrual cycle.
• Use appropriate pain relief according to medical advice and package instructions.
• Seek medical evaluation if the pain becomes severe, persistent or progressively worse.

Home remedies can help manage symptoms, but they should not be used to delay evaluation of severe or unexplained pelvic pain.