Understanding Heavy Periods (Menorrhagia): Symptoms, Causes, and Relief

Menorrhagia is the medical term used to describe periods that are unusually heavy or last longer than seven days. While every woman's cycle is different, heavy periods are considered a medical concern when the blood loss interferes with your physical, emotional, or social quality of life.

In the UK, many women experience heavy bleeding at some stage, particularly during puberty or in the years leading up to the menopause (perimenopause). While it is common, you do not have to 'just live with it'. Modern medicine offers various effective ways to manage the flow and reduce secondary symptoms like fatigue and cramping.

It can be difficult to measure blood loss precisely, but there are clear clinical indicators that a period is excessively heavy. You may be experiencing menorrhagia if you:

• Have to change your pad or tampon every 1 to 2 hours because it is soaked.
• Need to use 'double protection', such as a tampon and a pad simultaneously.
• Wake up during the night specifically to change your sanitary products.
• Pass blood clots that are larger than a 10p coin (roughly 2.5cm).
• Bleed through your clothes or onto bedding (known as 'flooding').
• Have periods that consistently last longer than 7 days.

Beyond the bleeding itself, heavy periods often cause significant 'period pain' (dysmenorrhea) and symptoms of anaemia, such as shortness of breath, pale skin, and extreme tiredness.

There are several reasons why your periods might become heavier. Identifying the underlying cause is essential for choosing the right treatment. Common factors include:

• Hormonal Imbalances: If the balance between oestrogen and progesterone is disrupted, the lining of the womb (endometrium) can develop excessively, leading to heavy shedding. This is common in PCOS or thyroid issues.
• Uterine Fibroids: These are non-cancerous growths in the muscle of the womb. They are very common and often lead to heavier, more painful periods.
• Endometrial Polyps: Small, benign growths in the lining of the womb.
• Adenomyosis: A condition where the tissue that normally lines the womb starts to grow within the muscular wall of the womb.
• Intrauterine Devices (IUD): The non-hormonal copper coil can sometimes cause heavier periods, particularly in the first few months after insertion.

In some cases, heavy bleeding can be linked to pelvic inflammatory disease (PID) or, more rarely, blood clotting disorders.

When you speak with a healthcare professional about heavy periods, they will likely start by asking about your cycle history. It is helpful to keep a 'period diary' for a few months detailing how many products you use and how often you change them.

The NHS and NICE guidance suggest several diagnostic steps:

• Blood Tests: To check for iron-deficiency anaemia and to rule out thyroid dysfunction or clotting issues.
• Pelvic Ultrasound: To look for fibroids, polyps, or structural abnormalities in the womb and ovaries.
• Hysteroscopy: A narrow telescope is inserted through the cervix to examine the inside of the womb directly.
• Biopsy: A small sample of the womb lining may be taken for testing.

Treatment depends on your general health, the cause of the bleeding, and whether you are planning a pregnancy in the near future. Options typically include:

• Levonorgestrel-releasing intrauterine system (IUS): Often known by the brand name Mirena, this is the first-line treatment recommended by NICE. It thins the womb lining and can significantly reduce bleeding.
• Tranexamic Acid: Non-hormonal tablets taken only during your period. They work by helping the blood in your womb to clot more effectively.
• Non-Steroidal Anti-Inflammatory Drugs (NSAIDs): Such as ibuprofen or mefenamic acid, which can reduce both pain and blood loss.
• Combined Oral Contraceptive Pill: Helps regulate the cycle and thin the lining of the womb.
• GNRH Agonists: Medications used to shrink fibroids by mimicking a temporary menopause.

If medication is unsuccessful, surgical options such as endometrial ablation (removing the womb lining) or a hysterectomy may be discussed with a specialist.

If your periods are making it difficult to go to work, exercise, or leave the house, you should seek medical advice. An online GP can provide a discreet consultation to discuss your symptoms and help determine if your bleeding is within a healthy range.

You should consult a GP if:

• Your periods have suddenly become much heavier than usual.
• You are experiencing bleeding between periods or after sex.
• You feel constantly exhausted or dizzy during your cycle.
• Over-the-counter painkillers are not managing your period cramps.

An online GP can suggest initial treatments, request blood tests via your local lab, or provide a referral if further investigations like an ultrasound are required.