Your period came, then didn't. 42 days gap. Then 24. Then 60. You take a pregnancy test — negative. You tell your makcik and she says, "Normal lah, every woman also like that." But is it? Here's what actually causes irregular periods in Malaysian women.
A regular cycle lands somewhere between 21 and 35 days. The NHS defines irregular periods as cycles outside that window, or with a changing pattern — gap of 21 days one month, 45 the next. One-off oddness happens to everyone. The pattern worth paying attention to is irregular periods that go on for three cycles or more.
What count as irregular periods
Doctors look at four things: how far apart your periods are, how long each period lasts, how heavy the flow is, and whether that pattern changes. Any big shift — much shorter cycle, flooding, long gaps, bleeding between periods — makes periods "irregular." The NHS flags cycles under 21 days or over 35, and periods lasting longer than seven days.
8 common causes of irregular periods in Malaysian women
1. Chronic stress
KL traffic, two kids, a boss who texts after 10pm. Stress raises cortisol, which messes with the hormones that trigger ovulation. No ovulation that cycle, no normal period. Stress is one of the most common and most under-recognised causes of irregular periods.
2. Weight changes — up or down
Both significant weight loss and gain can throw off periods. Body fat helps make estrogen; too little or too much tips the balance. Malaysia's NHMS 2019 found that about half of adults are overweight or obese, which is one reason PCOS-linked irregular periods are so common here.
3. Polycystic Ovary Syndrome (PCOS)
PCOS is one of the leading causes of irregular periods worldwide, especially in Asian women. Signs that go with it: acne, extra facial or body hair, weight that won't shift from the belly, trouble conceiving. A GP can order a blood test and ultrasound.
4. Thyroid problems
An underactive or overactive thyroid can quietly cause irregular periods along with fatigue, cold hands, hair loss or unexplained weight change. One blood test — TSH — tells you.
5. Perimenopause
If you are in your late 30s or 40s, irregular periods are often the first sign of perimenopause — the hormonal transition before menopause. The Malaysian average age for menopause is around 51, with the transition starting up to ten years earlier.
6. Over-training or under-eating
Marathon training, strict diets, or both. Your body reads it as a crisis and switches off reproduction. Periods become light, short, or stop altogether. Scaling back the intensity usually brings irregular periods back to regular.
7. Hormonal birth control, starting or stopping
The pill, injections, implants and some IUDs change the cycle by design. When you stop them, it can take three to six months before natural periods settle. During that reset, irregular periods are normal.
8. Fibroids, endometriosis, or infection
Benign uterine growths and endometriosis both cause heavy, long, or painful periods. Pelvic infection can cause spotting or extra-long bleeding. All of these need a gynae visit, not supplements.
Why irregular periods matter beyond the inconvenience
Beyond the lifestyle headache, heavy or long irregular periods are a leading cause of iron deficiency in women. A Cochrane review of iron supplementation in menstruating women found that daily iron reduced anaemia and improved symptomatic fatigue — a reminder that irregular periods and tiredness are often linked, not separate problems.
When irregular periods need a doctor, not patience
- Periods stop for 90 days and you are not pregnant or breastfeeding
- Cycles under 21 days or over 35, for three cycles running
- Bleeding so heavy you soak through a pad in under an hour
- Bleeding between periods, or after sex
- Periods that last longer than seven days
- Any bleeding after your periods had already stopped for a year
Where Hishin Hemogreen fits in
Supplements can't fix irregular periods caused by PCOS, fibroids, thyroid, or perimenopause — those need a doctor. But many women look for gentler, daily nutritional support alongside their doctor's plan, especially when fatigue is part of the picture.
Hishin Hemogreen 云芝仙人掌 is a KKM-registered botanical wellness drink for women, Japan-formulated and produced under ISO, GMP and HACCP certification. Each 8g sachet combines four whole-plant ingredients:
- Turkey Tail mushroom — studied for immune support in women
- Oligo-fucoidan — researched in women's uterine wellness
- Mexican cactus powder — associated with lower inflammation in healthy adults
- Italian broccoli extract — a plant-based antioxidant studied in women
Mix one sachet with 150–200ml of warm (not hot) water each morning. Hemogreen is meant to work alongside — not instead of — your doctor's advice.
The bottom line on irregular periods
Irregular periods are rarely "nothing" and rarely "serious" — they are usually a signal that something upstream (stress, weight, thyroid, PCOS, perimenopause) is off. Track three cycles, see a GP, and don't let anyone tell you it is just normal to bleed heavily. In part two, we share practical ways Malaysian women can nudge irregular periods back to a steadier rhythm.
Learn more about Hishin Hemogreen →
Individual results vary. Hishin Hemogreen is a dietary supplement, not a substitute for medication or medical advice. Not suitable for pregnant or breastfeeding women, children, or those allergic to mushrooms, seaweed, cactus, or soy. Please consult your doctor before starting any supplement, especially if you are on medication.
Daily wellness, from your first sip.
Hishin Hemogreen is a KKM-registered botanical wellness drink for women — four whole-plant ingredients, Japan-formulated. One sachet in warm water each morning.
Explore Hemogreen →