How do I know if my periods are too heavy?

Signs include needing to change pads or tampons every 1 to 2 hours, doubling up on protection, passing large clots, bleeding for more than 7 days, or bleeding that restricts daily activities. If in doubt, track your bleeding for 2 to 3 cycles and discuss with a GP.

What causes heavy periods?

Often no cause is found. Known causes include fibroids, polyps, hormonal changes (including perimenopause), the copper IUD, polycystic ovary syndrome, blood clotting disorders, and — rarely — womb cancer. Investigation depends on age and symptoms.

Can heavy periods cause anaemia?

Yes. Losing a lot of blood each month can deplete iron stores, causing tiredness, pale skin, breathlessness and dizziness. A GP can check your blood count and iron levels and prescribe iron supplements if needed.

What treatments are available for heavy periods?

Options include tranexamic acid (reduces bleeding), anti-inflammatory painkillers, hormonal contraception (pill, patch, hormonal IUD), and procedures such as endometrial ablation or fibroid treatment. A GP or gynaecologist discusses what suits you.

Are heavy periods normal in perimenopause?

Periods often change in the years before menopause — cycles may become irregular and bleeding heavier. Still see a GP to rule out other causes, especially bleeding between periods or after sex.

Heavy periods | HealthAnswers

Quick answer

What is heavy periods?

Heavy periods (menorrhagia) mean bleeding that is unusually heavy or long — soaking through pads or tampons every hour or two, passing large clots, or bleeding for more than 7 days. Common causes include fibroids, hormonal changes and the copper coil. See a GP if heavy bleeding affects your life or causes anaemia symptoms like tiredness.

When periods are heavier than normal

Heavy menstrual bleeding — medically called menorrhagia — affects about one in five women at some point. It means losing more blood than is typical during a period, or bleeding for longer. Heavy periods are common but not something you simply have to accept — effective treatments exist.

What counts as a heavy period

You may have heavy periods if you:

need to change pads or tampons every 1 to 2 hours
use double protection (pad plus tampon)
pass blood clots larger than about 2.5cm (10p coin size)
bleed for more than 7 days
need to get up at night to change protection
restrict daily activities because of bleeding
feel tired, breathless or dizzy — signs of iron deficiency anaemia

Tracking your bleeding over two or three cycles helps a GP assess severity.

Common causes

Sometimes no underlying cause is found. When a cause is identified, common ones include:

Fibroids — non-cancerous growths in the womb wall, common in your 30s and 40s

Polyps — small growths in the womb lining

Hormonal changes — including perimenopause (the transition to menopause)

Copper IUD — the non-hormonal coil can make periods heavier

Polycystic ovary syndrome (PCOS) — irregular cycles and sometimes heavy bleeding

Blood clotting disorders — less common

Medications — including anticoagulants

Womb cancer — rare but more likely after menopause; any postmenopausal bleeding needs urgent assessment

When heavy periods cause anaemia

Losing significant blood each month can deplete iron, leading to iron deficiency anaemia — tiredness, pale skin, shortness of breath on exertion, and heart palpitations. A GP can check with a blood test and prescribe iron supplements alongside treating the heavy bleeding.

What a GP may do

Assessment may include:

blood tests for anaemia and thyroid function
pelvic examination
ultrasound scan of the womb and ovaries
referral to gynaecology if needed

Treatment depends on cause, age, and whether you plan to have children.

Treatment options

Non-hormonal:

Tranexamic acid — tablets taken during bleeding that reduce blood loss
NSAIDs — ibuprofen or mefenamic acid reduce bleeding and ease pain

Hormonal:

combined or progestogen contraception
Hormonal IUD (Mirena) — often dramatically reduces bleeding

Procedural:

endometrial ablation (lining of womb treated)
fibroid removal or embolisation
hysterectomy — for severe cases when other options fail and family is complete

When to seek urgent help

Seek urgent assessment for bleeding that soaks through protection hourly and will not slow, fainting, or severe pain with heavy bleeding — especially if there is a chance of pregnancy or miscarriage.

Heavy periods and quality of life

Heavy bleeding affects work, relationships, and physical health. If your periods limit your life, you deserve investigation and treatment — not reassurance to “wait and see” without assessment.

Common questions

How do I know if my periods are too heavy?: Signs include needing to change pads or tampons every 1 to 2 hours, doubling up on protection, passing large clots, bleeding for more than 7 days, or bleeding that restricts daily activities. If in doubt, track your bleeding for 2 to 3 cycles and discuss with a GP.
What causes heavy periods?: Often no cause is found. Known causes include fibroids, polyps, hormonal changes (including perimenopause), the copper IUD, polycystic ovary syndrome, blood clotting disorders, and — rarely — womb cancer. Investigation depends on age and symptoms.
Can heavy periods cause anaemia?: Yes. Losing a lot of blood each month can deplete iron stores, causing tiredness, pale skin, breathlessness and dizziness. A GP can check your blood count and iron levels and prescribe iron supplements if needed.
What treatments are available for heavy periods?: Options include tranexamic acid (reduces bleeding), anti-inflammatory painkillers, hormonal contraception (pill, patch, hormonal IUD), and procedures such as endometrial ablation or fibroid treatment. A GP or gynaecologist discusses what suits you.
Are heavy periods normal in perimenopause?: Periods often change in the years before menopause — cycles may become irregular and bleeding heavier. Still see a GP to rule out other causes, especially bleeding between periods or after sex.

Sources

NHS — Heavy periods