What research and doctors say
Ask a doctorKnow what "heavy" means
Needing to change a pad or tampon every 1–2 hours, passing clots bigger than a coin, bleeding through to clothes or bedding, or periods lasting more than 7 days — these are worth seeing a doctor about.
Read: heavy periods guide
Strong evidenceAsk about tranexamic acid or the hormonal coil
A doctor can prescribe medicines that reduce bleeding a lot, such as tranexamic acid tablets taken only on period days, or a hormonal IUD.
NHS: Heavy periods
Practical tipWatch your iron
Heavy periods can cause anaemia, which makes you tired and breathless. Eat iron-rich foods and ask for a blood test if you're exhausted.
Practical tipPeriod pants under a cup or tampon
Many women use a menstrual cup or tampon with period pants as back-up on the heaviest days, especially at night.
General information, not medical advice. Check medicines with a pharmacist, especially if you're pregnant, breastfeeding or take other medication.