Menstrual Bleeding - Causes, Treatment & When to See a Doctor

What is Menstrual Bleeding?

Menstrual bleeding, commonly called a period, is the regular shedding of the uterine lining (endometrium) that occurs in people with a uterus as part of the menstrual cycle. Typically, this bleeding lasts 3‑7 days and repeats every 21‑35 days, depending on hormonal balance and individual variation. While most menstrual bleeding is normal, changes in amount, duration, or pattern can signal an underlying health issue that warrants evaluation.

Normal menstrual blood is a mixture of blood, cervical mucus, and endometrial tissue. The average volume is 30‑80 mL (about 2‑6 tablespoons) per cycle, though “normal” can vary widely. Understanding what is typical for you helps you recognize when something is abnormal.

Common Causes

Below are the most frequent medical conditions and physiological factors that can alter menstrual bleeding. Some cause heavier or prolonged flow (menorrhagia), while others lead to lighter or absent flow (hypomenorrhea or amenorrhea).

• Hormonal Imbalance – Fluctuations in estrogen and progesterone, often due to polycystic ovary syndrome (PCOS) or perimenopause.
• Uterine Fibroids (Leiomyomas) – Benign smooth‑muscle tumors that can increase bleeding volume.
• Uterine Polyps – Small, benign growths on the endometrial lining that may cause spotting or heavy flow.
• Adenomyosis – Endometrial tissue grows into the uterine muscle, leading to painful, heavy periods.
• Endometrial Hyperplasia – Thickening of the uterine lining, often linked to excess estrogen.
• Coagulation Disorders – Conditions such as von Willebrand disease or platelet function defects that impair clotting.
• Thyroid Dysfunction – Both hypothyroidism and hyperthyroidism can disrupt menstrual regularity.
• Intrauterine Contraceptive Devices (IUDs) – Hormonal IUDs may cause spotting; copper IUDs can increase flow.
• Medications – Anticoagulants, antiplatelet agents, and certain hormonal therapies.
• Pregnancy‑Related Issues – Implantation bleeding, miscarriage, or ectopic pregnancy can present as abnormal bleeding.

Associated Symptoms

Changes in menstrual bleeding often accompany other signs that help pinpoint the cause. Commonly reported accompanying symptoms include:

• Pelvic or lower‑abdominal pain/cramping
• Back pain or leg heaviness
• Fatigue or iron‑deficiency anemia (especially with heavy bleeding)
• Spotting between periods
• Unexplained weight gain or loss
• Acne, excess facial hair, or thinning scalp hair (suggestive of hormonal imbalance)
• Breast tenderness or galactorrhea
• Changes in bowel or bladder habits (e.g., constipation, urinary urgency)
• Fever, chills, or foul‑smelling vaginal discharge (possible infection)

When to See a Doctor

Most menstrual changes are benign, but certain patterns require prompt medical attention. Schedule an appointment if you notice any of the following:

• Bleeding that lasts longer than 8 days or recurs more than once a month.
• Loss of more than 80 mL (≈ 1/3 cup) of blood per cycle, or the need to change a tampon/pad every hour.
• Sudden change in flow intensity (e.g., a previously light period becomes heavy).
• Bleeding after intercourse, between periods, or after menopause.
• Severe pelvic pain that does not improve with over‑the‑counter pain relievers.
• Signs of anemia: shortness of breath, dizziness, pale skin, or rapid heartbeat.
• Fever, foul odor, or thick “cottage‑cheese” discharge (possible infection).
• Difficulty conceiving after 12 months of regular, unprotected intercourse.

Diagnosis

Evaluation begins with a thorough history and physical exam, followed by targeted investigations.

1. Medical History

• Age of menarche, cycle length, regularity, and typical flow.
• Medication list (including OTC supplements and herbal products).
• Family history of bleeding disorders, fibroids, or endocrine disease.
• Recent weight changes, stressors, or travel.

2. Physical Examination

• General assessment for signs of anemia or thyroid disease.
• Abdominal and pelvic exam to feel for enlarged uterus, masses, or tenderness.

3. Laboratory Tests

• Complete blood count (CBC) – evaluates anemia and platelet count.
• Serum ferritin – assesses iron stores.
• Thyroid‑stimulating hormone (TSH) – screens for thyroid dysfunction.
• Coagulation profile (PT/INR, aPTT) and von Willebrand factor if a bleeding disorder is suspected.
• Hormone panel (FSH, LH, estradiol, progesterone) for suspected PCOS or menopause.

4. Imaging & Procedures

• Transvaginal ultrasound – First‑line imaging to detect fibroids, polyps, adenomyosis, or ovarian cysts.
• Sonohysterography – Saline infusion ultrasound for detailed endometrial evaluation.
• Endometrial biopsy – Recommended for women >45 years with abnormal bleeding to rule out hyperplasia or cancer.
• Magnetic resonance imaging (MRI) – Used when ultrasound is inconclusive, especially for adenomyosis.
• Laparoscopy or hysteroscopy – Direct visualization and possible removal of lesions.

Treatment Options

Treatment is individualized based on the underlying cause, severity of bleeding, desire for fertility, and patient preferences.

1. Lifestyle & Home Measures

• Iron‑rich diet (red meat, leafy greens, legumes) and vitamin C to enhance absorption.
• Regular aerobic exercise – helps regulate hormones and may reduce heavy flow.
• Stress‑reduction techniques (yoga, meditation) – can improve cycle regularity.
• Heat therapy (warm compresses) for menstrual cramps.

2. Pharmacologic Therapies

• Non‑steroidal anti‑inflammatory drugs (NSAIDs) – Ibuprofen or naproxen reduce prostaglandin‑mediated bleeding and pain.
• Combined oral contraceptives (COCs) – Stabilize hormone levels, often lighten flow and reduce frequency of spotting.
• Progestin‑only pills, injectable depot medroxyprogesterone acetate (DMPA), or levonorgestrel‑releasing intrauterine system (LNG‑IUS) – Effective for heavy bleeding and endometrial protection.
• Tranexamic acid – Antifibrinolytic that reduces menstrual blood loss by 30‑50 % when taken during the first 3‑4 days of flow.
• Oral iron supplements – Treat iron‑deficiency anemia; ferrous sulfate 325 mg 1‑2 times daily is common.
• Gonadotropin‑releasing hormone (GnRH) agonists – Short‑term therapy for fibroids or adenomyosis when surgery is delayed.

3. Surgical & Procedural Options

• Endometrial ablation – Destroys the uterine lining, suitable for women who have completed childbearing.
• Myomectomy – Surgical removal of fibroids while preserving the uterus.
• Hysterectomy – Definitive treatment for refractory bleeding; considered only after other options fail.
• Uterine artery embolization (UAE) – Minimally invasive radiologic procedure to shrink fibroids.
• Polypectomy – Removal of endometrial polyps via hysteroscopy.

4. Management of Underlying Disorders

• PCOS – Lifestyle modification plus metformin or COCs.
• Thyroid disease – Levothyroxine for hypothyroidism or antithyroid meds for hyperthyroidism.
• Bleeding disorders – Desmopressin, factor replacement, or specific clotting factor concentrates.

Prevention Tips

While some causes (e.g., fibroids) cannot be completely prevented, several strategies can reduce the risk of abnormal menstrual bleeding or lessen its impact.

• Maintain a healthy weight – Obesity is linked to hormonal imbalance and heavier periods.
• Balanced nutrition – Adequate iron, folate, and vitamin B12 support healthy blood production.
• Regular physical activity – Helps regulate estrogen metabolism.
• Avoid smoking and limit alcohol – Both can affect hormone levels and uterine blood flow.
• Use contraception consistently if you have known heavy bleeding; hormonal methods often improve flow.
• Screen for thyroid disease every 5 years if you have a family history.
• Annual pelvic exams after age 35 or earlier if symptomatic, to detect polyps, fibroids, or early malignancy.

Emergency Warning Signs

If you experience any of the following, seek emergency medical care (e.g., go to the nearest emergency department or call emergency services):

• Sudden, profuse bleeding soaking through a pad or tampon every hour for more than 2 hours.
• Severe abdominal or pelvic pain accompanied by fainting, dizziness, or rapid heartbeat.
• Signs of shock: pale, clammy skin; confusion; low blood pressure.
• Heavy bleeding after a recent miscarriage, childbirth, or abortion.
• Bleeding with a high fever (>38 °C/100.4 °F) or foul‑smelling discharge – possible sepsis.
• Sudden onset of bleeding during pregnancy (possible ectopic pregnancy or miscarriage).

References

1. Mayo Clinic. “Menstrual cramps (dysmenorrhea).” Accessed Jan 2024.
2. American College of Obstetricians and Gynecologists (ACOG). “Management of Abnormal Uterine Bleeding.” 2020.
3. World Health Organization. “Iron deficiency anaemia: assessment, prevention and control.” WHO Guideline, 2022.
4. National Institutes of Health (NIH). “Polycystic Ovary Syndrome.” 2023.
5. Cleveland Clinic. “Uterine Fibroids: Symptoms, Diagnosis, and Treatment.” 2023.
6. Centers for Disease Control and Prevention (CDC). “Bleeding Disorders.” 2022.
7. American Society of Hematology. “von Willebrand Disease.” 2023.
8. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). “Thyroid Disease.” 2024.