Painful periods are so common in India that most women grow up believing this level of pain is simply part of being female. Dr. Neha Sain explains the difference between primary and secondary dysmenorrhoea, why period pain should never be simply normalised, and what effective treatment looks like.
The most damaging thing said to girls and young women about period pain — across generations, in families, in schools, sometimes in clinics — is some version of: "This is normal. All women go through it. You will get used to it."
Sometimes this is accurate. Mild to moderate period pain is common. But the statement is used far too broadly, applied to pain that is debilitating, progressive, and in many cases a symptom of a serious, treatable condition. The normalisation of severe period pain is one of the primary reasons that endometriosis — which affects up to 10% of women of reproductive age — takes an average of 7 to 10 years to diagnose globally, and longer in India.
Period pain is medically called dysmenorrhoea, and there are two fundamentally different kinds. Understanding the difference is the starting point.
Primary Dysmenorrhoea: The Common Kind
Primary dysmenorrhoea is period pain that occurs without any underlying pelvic pathology. It is the most common type and typically begins within the first year or two of a girl's periods starting.
The pain is caused by prostaglandins — hormone-like chemicals produced by the uterine lining that cause the uterus to contract in order to shed its lining. Higher concentrations of prostaglandins produce stronger, more painful contractions. In some women, these contractions are intense enough to reduce blood flow to the uterine muscle itself, producing ischaemic pain similar to a cramp.
Characteristics of primary dysmenorrhoea:
- Cramping pain in the lower abdomen, typically beginning just before or at the start of menstruation
- Usually most intense in the first 1 to 2 days and then easing
- May radiate to the lower back or upper thighs
- Often accompanied by nausea, diarrhoea, headache, or fatigue
- Tends to improve with age and often significantly after a first pregnancy
Secondary Dysmenorrhoea: Pain With an Underlying Cause
Secondary dysmenorrhoea is period pain caused by an identifiable pelvic condition. It tends to:
- Begin later in the reproductive years (though can start in adolescence, particularly with endometriosis)
- Worsen progressively over time rather than staying the same or improving
- Persist longer into the period, or be present outside of menstruation as chronic pelvic pain
- Not respond adequately to standard pain medications
- Be accompanied by other symptoms — heavy bleeding, pain during sex, bowel or bladder symptoms
The most important conditions to consider:
Endometriosis: Tissue similar to the uterine lining growing outside the uterus, causing inflammation, scarring, and severe pain. The pain is classically described as deep, debilitating, and getting worse over time. A significant proportion of women with endometriosis report that their pain was present from their very first periods and was consistently dismissed as normal. Early recognition matters — both because the condition is progressive and because early intervention preserves fertility better than late.
Adenomyosis: A condition in which endometrial tissue grows into the muscle of the uterine wall. Produces heavy, painful periods, often with a boggy, enlarged uterus on examination. More common in women in their thirties and forties.
Uterine fibroids: Non-cancerous muscular growths in the uterus that can cause heavy, painful periods, particularly when they distort the uterine cavity. Very common in Indian women, with rates estimated at 20–30% of reproductive-age women.
How Period Pain Is Assessed
A proper evaluation includes a detailed menstrual history (when the pain started, its character, severity, timing within the cycle, what makes it better or worse), associated symptoms, and a pelvic examination.
Investigations that may be appropriate:
- Pelvic ultrasound — helpful for fibroids, adenomyosis, and endometriomas, but does not rule out peritoneal endometriosis
- Blood tests if there is concern about infection or anaemia from heavy bleeding
- Laparoscopy — for definitive diagnosis of endometriosis when clinically suspected
What Helps: Evidence-Based Treatment
For Primary Dysmenorrhoea
NSAIDs (non-steroidal anti-inflammatory drugs): Ibuprofen, mefenamic acid, and naproxen are significantly more effective than paracetamol for period pain because they reduce prostaglandin production rather than simply dulling the pain signal. The critical instruction: start taking them at the very beginning of menstruation — do not wait for the pain to peak. Take them regularly for the first 1 to 2 days rather than waiting for pain to become severe between doses.
Heat: Applied to the lower abdomen, heat is well-evidenced as an adjunct to pain relief. A clinical trial published in Evidence-Based Nursing found that topical heat at 39°C was as effective as ibuprofen for period pain in the short term.
Combined oral contraceptive pill: By suppressing ovulation and reducing the thickness of the uterine lining, the pill reduces prostaglandin production and significantly decreases period pain in most women. It is a legitimate medical treatment for dysmenorrhoea, not just for contraception.
Exercise: Regular aerobic exercise has a documented effect on prostaglandin levels and on pain threshold generally. The evidence for regular exercise in reducing the severity of subsequent periods is real.
For Secondary Dysmenorrhoea
Treatment depends entirely on the underlying cause. Endometriosis is managed with hormonal suppression and surgical excision. Fibroids may require uterine-sparing surgery. Adenomyosis is managed hormonally in women who wish to preserve fertility, and by hysterectomy in those who do not.
The most important thing I want you to take from this is that severe period pain is not something you simply have to accept. It may have a treatable cause. And even if it is primary dysmenorrhoea, effective treatment exists.
If your pain is significantly affecting your quality of life, or if it is getting worse rather than better, a proper evaluation is worth pursuing. A Smart Consultation is available for a personalised clinical assessment of your symptoms within 48 hours.
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