Heavy Periods: Causes, Symptoms & Treatment Options

Heavy periods affect millions of women, yet many quietly accept the disruption without realizing that effective help is available. If you regularly soak through pads or tampons, pass large clots, or feel exhausted after each cycle, you may be experiencing heavy periods, a condition medically known as menorrhagia. Understanding what is normal and what is not is the first step toward feeling better.

Heavy menstrual bleeding refers to bleeding that is excessive or lasts longer than 7 days and interferes with daily life. Most women cannot measure this directly, so clinicians use functional signs: needing to change a pad or tampon every hour for several consecutive hours, passing large blood clots, or bleeding that significantly disrupts daily life.

Occasional heavier-than-usual cycles are rarely a concern. When heavy bleeding becomes a regular pattern, it deserves medical attention.

Heavy menstrual bleeding symptoms go beyond just a heavier flow. Common signs include:

• Soaking through one or more pads or tampons every hour for several hours.
• Passing unusually large blood clots, particularly clots about the size of a grape or larger.
• Needing to use double protection simultaneously.
• Waking at night to change sanitary products.
• Bleeding that lasts longer than 7 days.
• Flooding, where blood soaks through clothing.
• Fatigue, breathlessness, or dizziness from iron-deficiency anaemia.

Fatigue is often overlooked as a period symptom. If you feel persistently tired or short of breath around your period, it is worth checking your haemoglobin levels.

Understanding menorrhagia causes helps target the right treatment. There is rarely a single explanation, and sometimes no structural cause is found at all.

Hormonal Imbalance

The uterine lining grows under the influence of estrogen and is shed when progesterone falls. If these hormones are out of balance, the lining can become too thick and produce heavier bleeding. This is especially common in conditions like polycystic ovary syndrome (PCOS).

Uterine Fibroids and Polyps

Fibroids are non-cancerous muscle growths in or around the uterus. Polyps are small, soft growths on the uterine lining. Both can significantly increase menstrual blood loss, particularly when located near the inner lining.

Adenomyosis

In adenomyosis, the tissue that normally lines the uterus grows into the uterine muscle. This causes a bulky, tender uterus and characteristically heavy, painful periods.

Thyroid Problems

An underactive thyroid can disrupt the hormonal signals that regulate the menstrual cycle, often resulting in heavier or longer periods. A simple blood test can identify this.

Bleeding Disorders

Conditions such as von Willebrand disease, where blood does not clot efficiently, are an underrecognized cause of lifelong heavy periods. This is worth raising with your doctor, especially if heavy bleeding runs in your family.

IUDs and Medications

Copper intrauterine devices can increase menstrual flow, particularly in the first few months after insertion. Certain blood-thinning medications can also make bleeding heavier.

Heavy Periods After 40 and Perimenopause

Heavy periods after 40 are common as estrogen and progesterone levels become irregular in the years leading up to menopause. Cycles may become unpredictable, and bleeds may become heavier. While this is often hormonal, new heavy bleeding after 40 should always be evaluated to rule out other causes, including changes in the uterine lining.

Can Stress Cause Heavy Periods?

If you have ever asked yourself "why are my periods so heavy during stressful times," the answer is that significant physical or emotional stress can disrupt ovulation and hormonal balance, indirectly causing heavier or irregular periods. It is rarely the sole cause but can be a contributing factor.

See a doctor promptly if you:

• Soak through a pad or tampon every hour for two or more consecutive hours.
• Feel dizzy, faint, or unusually breathless during your period.
• Pass clots larger than about 2 cm regularly.
• Bleed for more than 7 days in most cycles.
• Have worsening pelvic pain.
• Experience heavy bleeding after menopause.

Do not manage heavy periods through self-diagnosis alone. Many causes are easily treated once identified, and some require investigation to rule out more serious conditions.

Your doctor will start with a detailed menstrual history and a pelvic examination. Investigations typically include:

• Blood tests: Check haemoglobin, iron stores, thyroid function, and clotting factors.
• Pelvic ultrasound: Looks for fibroids, polyps, or adenomyosis.
• Hysteroscopy: Uses a thin camera passed into the uterus to allow direct visualisation.
• Endometrial biopsy: May be performed in some cases, particularly for women over 40, to check for abnormal cell changes.

Heavy periods treatment depends on the underlying cause, severity, and whether you want to preserve fertility. Options range from lifestyle changes to surgery.

Lifestyle and Home Measures

Wondering how to stop heavy periods naturally? Iron supplementation can help if anaemia is confirmed. Staying well-hydrated, reducing intense exercise on the heaviest days, and keeping a period diary to share with your doctor are all practical starting points. These measures support overall health but generally do not address the root cause on their own.

Medications

Several medicines have good evidence for reducing heavy menstrual bleeding:

• Tranexamic acid: Taken during the period, it reduces blood loss by helping prevent the breakdown of blood clots. It is a non-hormonal treatment.
• NSAIDs: Non-steroidal anti-inflammatory drugs can modestly reduce blood loss and also help with period pain.
• Hormonal options: Combined oral contraceptive pills, progestogen-only pills, or a hormonal intrauterine system can thin the uterine lining over time and are effective for many women.

Your doctor will recommend the most appropriate option based on your medical history, age, and contraceptive needs.

Surgical Options

When medicines do not provide enough relief or when a structural cause is identified, surgical treatment may be considered:

• Endometrial ablation: Destroys the uterine lining and can substantially reduce menstrual bleeding. It is not appropriate if you want to become pregnant.
• Myomectomy: Removes fibroids while preserving the uterus.
• Hysterectomy: The surgical removal of the uterus. It is a permanent solution considered when other treatments have failed, and the woman does not wish to have children.

Not every treatment suits every woman. Key points to discuss with your doctor:

• Tranexamic acid: Contraindicated in women with active thromboembolic disease or a history of thrombosis or thromboembolism. It should also be used cautiously or avoided in women with certain inherited or acquired risks of thrombosis, based on medical assessment.
• Hormonal treatments: Combined hormonal contraceptives may not be suitable for women aged 35 or older who smoke and may also be unsuitable for women with certain types of migraine, uncontrolled high blood pressure, or other specific medical conditions.
• Endometrial ablation and hysterectomy: Not appropriate for women who wish to become pregnant.
• Pregnancy: Any treatment should be avoided during pregnancy. If there is any chance you could be pregnant, tell your doctor before starting therapy.

Always disclose your full medical history, including any supplements or over-the-counter medicines, before starting treatment.

Heavy periods can have several causes, including hormonal changes, fibroids, adenomyosis, thyroid problems, bleeding disorders, IUDs, and certain medicines. Persistent or very heavy menstrual bleeding should be evaluated to identify the underlying cause and reduce the risk of iron-deficiency anaemia. Treatment depends on the cause, severity, and fertility plans and may include tranexamic acid, NSAIDs, hormonal treatments, or surgical options when appropriate. If heavy bleeding is affecting daily life, lasting more than 7 days, or causing symptoms such as dizziness, faintness, or breathlessness, speak with a healthcare professional for appropriate evaluation and treatment.