Periods often get heavier, longer or less predictable as you approach menopause. That's common, but common doesn't mean you have to put up with it, and some changes should always be checked.
In short
- Uneven hormones in perimenopause can make the womb lining thicker, so bleeding can be heavier.
- The NHS describes clear signs of heavy periods, such as changing a pad or tampon every 1 to 2 hours.
- There are effective treatments, and new or unusual bleeding should be checked.
Why can periods get heavier?
In perimenopause, some cycles happen without ovulation. Estrogen keeps building the womb lining while progesterone, which normally balances it, is lower. When the lining finally sheds, the bleed can be heavier and longer. Fibroids and polyps also become more common in the 40s.
How heavy is too heavy?
According to the NHS, you may have heavy periods if you:
- need to change your pad or tampon every 1 to 2 hours
- need to use two types of period product together
- bleed for more than 7 days
- pass clots bigger than about 2.5 cm
- bleed through to your clothes or bedding
- avoid activities or take time off because of your period
- often feel tired or short of breath
Why it matters
Heavy bleeding can lead to low iron (iron deficiency anaemia), which adds to tiredness, breathlessness and brain fog.
What can help?
A doctor may offer a hormonal coil (IUS), tranexamic acid to reduce bleeding, anti-inflammatory painkillers, or other options if there's an underlying cause. A blood test can check your iron.
When to see a doctor
See your doctor if heavy periods affect your life, if your bleeding is heavier than it used to be, if periods come less than 21 days apart, if you bleed between periods or after sex, or if you have severe pain.
Always get checked if you have any bleeding after 12 months without a period, even if it happens only once or is very light.
Frequently asked questions
Is it normal to have clots in perimenopause?
Small clots can happen. Clots bigger than about 2.5 cm are a sign of heavy bleeding worth discussing with your doctor.
Can periods be heavy and then skip months?
Yes. Irregular cycles are typical in perimenopause.
Should I check my iron?
If you bleed heavily or feel very tired, ask your doctor for a blood test.
Show what has changed
Log your period days and how heavy they are in Pausie. A few months of notes show your doctor exactly what has changed. No account, and your diary stays on your phone.
This article is general information, not medical advice. Written by the Pausie team. Published and last reviewed 30 October 2026.
Sources
- NHS: Heavy periods
- EMAS Menopause Essentials: Assessing perimenopausal and postmenopausal bleeding
- Cleveland Clinic: Perimenopause