Without ovulation there is no progesterone rise, so the womb lining can build up and then shed heavily. Soaking a pad every hour for 2 hours, large clots, bleeding over 7 days or severe pain mean see a doctor soon.
Heavy periods are one of the less talked-about sides of PCOD. Most people hear that PCOD means missing periods. Many women also have the opposite, a long wait followed by a flood. Knowing what is heavy and what is not helps you decide when to act.
What is a typical flow
A typical period lasts 2 to 7 days. A pad changes every 3 to 4 hours or less often. That is the range most doctors consider ordinary.
Some signs mean a visit to the doctor soon:
- soaking a pad every hour for 2 hours
- large clots
- bleeding over 7 days
- severe pain
Why PCOD can make periods heavy
Each month the womb lining grows to prepare for a possible pregnancy. After ovulation, progesterone rises and keeps the lining in order. In PCOD the egg often does not release. Without ovulation there is no progesterone rise, so periods become late, missed or heavy.
Think of the lining as a wall of bricks that keeps being added to. If a month or two goes by without a period, the wall gets thicker. When it finally comes away, it comes away in quantity. That is why a long gap is sometimes followed by a heavy bleed.
Other causes of heavy bleeding
PCOD is only one possible reason. A thick lining, fibroids or a thyroid problem can cause heavy periods too. This is why a doctor checks rather than assuming. A pelvic ultrasound can look at the womb, the ovaries and how thick the lining is. A blood test can check thyroid levels and iron.
PCOD, PCOS and now PMOS, the new official name for PCOS, can sit alongside these other conditions. Having one does not rule out the others.
What heavy bleeding can do to you
Blood loss can lower iron and lead to anaemia. Tiredness is the common sign, and low iron can also thin the hair. If you feel worn out through the month, mention it. Doctors check iron, vitamin D and B12 as part of the usual tests.
If periods keep being heavy and long, tell your doctor even when you feel well. Repeated thick lining is a reason to look closer.
What a doctor may do
Your doctor may advise an ultrasound for the thickness of the lining, and blood tests. A lining biopsy or hysteroscopy is done only if needed.
To settle the cycle and protect the lining, options include hormonal pills, progestins and a progestin-releasing IUD. Which one suits you depends on your age, your goals and whether you want a pregnancy. All medicines are taken only on your doctor's advice.
Lifestyle still matters. If you carry extra weight, losing 5 to 10% of your body weight can bring back regular ovulation and periods. That is a long-term step, so it sits alongside treatment and does not replace it.
How to track it
The tracker is simple. Write the first day of every period and the number of days. Mark the flow as light, medium or heavy, and rate any pain from 0 to 10. Note how often you change a pad and whether you pass clots. Add your weight and any notes.
Take a photo or bring the page. It gives your doctor facts rather than guesses.
When to see a doctor soon
Book a visit soon if you are soaking a pad every hour for 2 hours, passing large clots, bleeding for more than 7 days, or having severe pain. Do not wait for the next cycle to see whether it repeats.
Book a routine visit too if your periods are often heavy even when they stay under those limits, or if you have been tired for weeks. You do not have to put up with heavy periods because "that is how mine are".
If the bleeding is very heavy, or you feel faint or dizzy, that is the urgent list at the end of this page, and it needs help the same day.
A doctor decides
This article is education, not a diagnosis. Heavy bleeding has several possible causes, and a doctor who has your history, tests and scan decides which applies. It is common, it is manageable, and it is not your fault.
When to get help urgently
Do not wait for an appointment if you have any of these. Get medical help the same day.
- severe lower tummy pain
- fainting
- very heavy bleeding
- chest pain or breathlessness
- a sudden deepening of the voice with rapid hair growth
Common questions
How do I know if my period is too heavy?
Why are my periods heavy after a long gap?
Can heavy periods cause tiredness?
Is heavy bleeding always because of PCOD?
Not a diagnosis
This guide is for education. Only a doctor who has examined you and seen your tests can tell you what is going on. If you have symptoms that worry you, book a visit or message us on WhatsApp.