Quick answer. Some cramping and moderate bleeding are normal, but periods that soak a pad or tampon every 1-2 hours, last beyond 7 days, pass large clots, or cause flooding and anaemia (tiredness, breathlessness) are not. Pain that painkillers cannot control or that stops you working or socialising is also a red flag. Common causes include fibroids, endometriosis, adenomyosis and PCOS. In Singapore, see a GP, women’s clinic or O&G (KKH, SingHealth, NUH); an ultrasound and blood test help find the cause. Treatments range from NSAIDs and tranexamic acid to the pill, the hormonal IUS (Mirena) and surgery. Postcoital or postmenopausal bleeding always needs review.
Many women in Singapore put up with heavy or painful periods for years, assuming nothing can be done. In reality, heavy menstrual bleeding (menorrhagia) and painful periods (dysmenorrhoea) are common, often treatable, and sometimes a sign of an underlying condition such as fibroids, endometriosis, adenomyosis or PCOS.
This guide explains what counts as normal versus not, the red flags that mean you should be seen sooner rather than later, and the range of treatments available locally — from simple painkillers to the hormonal IUS and surgery. It is general information and not a substitute for assessment by a doctor.
At a glance
| Feature | Usually normal | See a doctor |
|---|---|---|
| Bleeding amount | Pad/tampon changed every 3-4 hours | Soaking through every 1-2 hours or 'flooding' |
| Duration | Around 3-7 days | Longer than 7 days, or unpredictable |
| Clots | Small clots occasionally | Frequent large clots (golf-ball sized) |
| Pain | Mild cramps eased by NSAIDs/heat | Pain not relieved by painkillers; stops daily activities |
| Other symptoms | None | Tiredness, breathlessness, dizziness (possible anaemia) |
| Timing | Only with periods | Bleeding after sex or after menopause — always reviewed |
What is heavy or painful menstrual bleeding?
Menorrhagia is heavy or prolonged menstrual bleeding — clinically over 80ml per cycle, but more practically any bleeding that disrupts your physical, social or emotional life. Practical signs include soaking through pads or tampons every 1-2 hours, bleeding for more than seven days, passing large clots, or needing double protection and frequent overnight changes.
Dysmenorrhoea means painful periods. Primary dysmenorrhoea has no underlying disease, is common in younger women and often improves with age. Secondary dysmenorrhoea is caused by a condition such as endometriosis, adenomyosis, fibroids or pelvic infection, and tends to start later or worsen over time.
Common causes
- Fibroids — non-cancerous growths in the womb muscle that can cause very heavy and/or painful periods, especially when large or affecting the womb lining.
- Endometriosis — tissue similar to the womb lining grows outside the uterus; the commonest cause of secondary period pain and often linked to heavy bleeding and pain during sex or bowel movements.
- Adenomyosis — womb-lining tissue grows into the muscle wall, causing heavy, painful periods and a bulky, tender uterus.
- PCOS (polycystic ovary syndrome) — hormonal imbalance and irregular ovulation can cause infrequent then heavy bleeding.
- Other causes — polyps, anovulatory (hormonal) cycles, thyroid problems, bleeding disorders, and rarely, womb-lining abnormalities or cancer (more of a concern after 40).
See our related guides on uterine fibroids and endometriosis in Singapore for more detail on those conditions.
Red flags — when to see a doctor
Seek medical review promptly if you have:
- Flooding, or soaking through a pad/tampon every 1-2 hours
- Large blood clots or bleeding that lasts longer than seven days
- Symptoms of anaemia: tiredness, breathlessness, dizziness or palpitations
- Period pain that painkillers do not control, or that forces you to miss work or school
- Deep pain during or after sex, or pain when passing motion
Always have these reviewed without delay: bleeding after sex (postcoital), bleeding between periods, and any bleeding after menopause. These are never assumed to be normal and need assessment to rule out serious causes.
How it is assessed in Singapore
You can start with a GP or women’s health clinic, who may refer you to an O&G specialist at KKH, a SingHealth or NUH clinic, or in private practice. Assessment usually includes a history and examination, a pelvic ultrasound to look for fibroids, polyps, adenomyosis or ovarian cysts, and a blood test to check for anaemia and sometimes thyroid or hormone levels. A cervical screening test (Pap/HPV) may be done if due, and in some cases a sample of the womb lining is taken.
Treatment options
Treatment depends on the cause, your symptoms and whether you wish to conceive. Options include:
- NSAIDs (e.g. mefenamic acid, ibuprofen) — reduce both pain and bleeding; best started at the onset of the period.
- Tranexamic acid — a non-hormonal tablet that can reduce flow by around half; taken only during the period.
- Combined oral contraceptive pill — regulates and lightens periods and eases pain.
- Hormonal IUS (Mirena) — a small device in the womb that can reduce bleeding markedly and lasts about five years; often first-line for heavy bleeding and helpful for endometriosis/adenomyosis pain.
- Other hormonal options — progestogen tablets or injections.
- Surgery — removing fibroids or polyps, endometrial ablation, uterine artery embolisation for fibroids, or hysterectomy when other treatments fail and childbearing is complete.
Correcting anaemia with iron, and treating the underlying condition, are part of the plan.
How to prepare for your appointment
Keeping a short record before you see a doctor makes the consultation far more useful. For two or three cycles, note the dates, how many pads or tampons you use, whether you flood or pass large clots, and how pain affects your day-to-day life.
- Track flow, duration, clots and any bleeding between periods or after sex.
- Rate your pain and note whether painkillers help.
- List symptoms of anaemia such as tiredness, breathlessness or dizziness.
- Bring details of past treatments, the contraceptive pill, and whether you hope to conceive.
Self-management at home
While you are being assessed, some measures can ease symptoms. Starting an NSAID such as ibuprofen or mefenamic acid at the onset of the period can reduce both pain and flow; take it with food and only if it suits you. A heat pack, gentle activity and adequate rest may help cramps. Iron-rich foods support recovery if you tend to run low, but persistent tiredness should be reviewed rather than self-treated with supplements alone.
Questions to ask your doctor
- What is the likely cause of my heavy or painful periods?
- Do I need a scan or blood tests, and what are they checking for?
- Which treatments suit me, especially if I want to conceive later?
- Am I anaemic, and do I need iron treatment?
Common questions
Is the hormonal IUS only for contraception?
No. The hormonal IUS markedly reduces menstrual bleeding and is often used as a treatment for heavy periods, as well as for contraception.
Are heavy periods ever a sign of something serious?
Usually the cause is benign, but bleeding after sex, between periods or after menopause always needs review to exclude serious causes.
Related guides
- Best Gynaecology Clinics in Singapore — our editorial shortlist
- gynaecology clinics directory
- Ovarian cysts
- Vaginal infections (thrush & BV)
- Contraception & birth control
Sources
- SingHealth – Menorrhagia (Heavy Menstruation)
- SingHealth – Dysmenorrhoea (Menstrual Cramps) & Endometriosis
- SingHealth – Endometriosis
- HealthXchange (SingHealth) – Gynaecological Conditions Q&A
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Part of our Women’s health & gynaecology guides · Browse all health topics