8 Types of Abnormal Menstruation: Causes, Symptoms & Treatment
Aug 20, 2026
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3 min
8 Types of Abnormal Menstruation Every Woman Should Know
No two menstrual cycles are exactly alike. However, a healthy menstrual cycle generally follows a predictable pattern. When your periods become unusually heavy, too light, too frequent, too infrequent, or occur unexpectedly, it may indicate abnormal menstruation.
Many women experience an abnormal menstrual cycle at some point in their lives due to stress, hormonal changes, or medical conditions. While occasional variations are often harmless, persistent changes should never be ignored.
In this article, we'll explore the 8 types of abnormal menstruation, their possible causes, and when it's time to consult a gynaecologist.
What is Abnormal Menstruation?
Abnormal menstruation refers to any menstrual pattern that differs significantly from your usual cycle or from what's considered medically normal.
This may include:
- Bleeding between periods
- Heavy menstrual bleeding
- Very light periods
- Missed periods
- Frequent periods
- Long gaps between periods
- Painful periods
- Menstrual bleeding lasting unusually long
An abnormal menstrual period can affect women of any age, from adolescence to perimenopause.
The 8 Types of Abnormal Menstruation
1. Amenorrhea (Absent Periods)
Amenorrhea refers to the absence of menstruation.
It can be:
- Primary Amenorrhea: Menstruation has not started by around age 15 in someone with otherwise typical pubertal development.
- Secondary Amenorrhea: Periods stop for three months or more in someone who previously had regular cycles (or six months for previously irregular cycles).
Possible causes include pregnancy, hormonal disorders, excessive exercise, significant weight changes, thyroid disorders, or polycystic ovary syndrome (PCOS).
2. Oligomenorrhea (Infrequent Periods)
Women with oligomenorrhea have menstrual cycles that occur more than 35 days apart.
Common causes include:
- PCOS
- Thyroid disorders
- Stress
- Excessive physical activity
- Perimenopause
3. Polymenorrhea (Frequent Periods)
This condition occurs when periods arrive less than 21 days apart.
Possible causes include hormonal imbalances, uterine abnormalities, or ovulatory disorders.
4. Menorrhagia (Heavy Menstrual Bleeding)
Menorrhagia is one of the most common forms of abnormal menstrual bleeding.
Symptoms include:
- Heavy bleeding lasting more than seven days
- Passing large blood clots
- Needing to change sanitary products very frequently
- Fatigue due to iron deficiency anemia
5. Metrorrhagia (Bleeding Between Periods)
Bleeding that occurs between regular menstrual cycles is called metrorrhagia.
Possible causes include:
- Cervical polyps
- Uterine fibroids
- Hormonal imbalance
- Certain medications
- Pregnancy-related conditions
Any unexpected bleeding should be medically evaluated.
6. Dysmenorrhea (Painful Periods)
Although mild discomfort is common, severe menstrual pain that interferes with daily activities is considered abnormal.
Potential causes include:
- Endometriosis
- Adenomyosis
- Fibroids
- Pelvic inflammatory disease
7. Hypomenorrhea (Very Light Periods)
Hypomenorrhea refers to unusually light menstrual bleeding.
Possible causes include:
- Hormonal contraception
- Low body weight
- Stress
- Thyroid disorders
- Perimenopause
8. Menometrorrhagia (Heavy and Irregular Bleeding)
This condition combines heavy menstrual bleeding with irregular timing.
It often requires medical evaluation because it may indicate hormonal disorders, uterine abnormalities, or other underlying conditions.
Also Read - Common Menstrual Problems: What’s Normal and What’s Not
What Causes Abnormal Menstruation?
The cause of abnormal menstruation varies depending on age, overall health, and medical history.
Common causes include:
- Hormonal imbalance
- Polycystic ovary syndrome (PCOS)
- Thyroid disorders
- Uterine fibroids
- Endometriosis
- Adenomyosis
- Pregnancy
- Perimenopause
- Stress
- Significant weight gain or loss
- Certain medications
- Bleeding disorders
A proper diagnosis is essential to identify the underlying cause.
Also Read - How Doctors Diagnose Menstrual Disorders: Key Tests & Evaluations
When Should You See a Doctor?
Consult a healthcare professional if you experience:
- Heavy bleeding that soaks through sanitary protection every hour
- Bleeding lasting longer than seven days
- Bleeding between periods
- Missed periods without pregnancy
- Severe menstrual pain
- Irregular cycles for several months
- Dizziness, weakness, or symptoms of anaemia
- Bleeding after menopause
Early evaluation helps identify underlying conditions and ensures timely treatment.
How is Abnormal Menstruation Diagnosed?
Your doctor may recommend:
- Detailed medical history
- Physical and pelvic examination
- Blood tests
- Pregnancy test
- Thyroid function tests
- Hormone testing
- Pelvic ultrasound
- Additional imaging or procedures when clinically indicated
Diagnosis depends on identifying the underlying cause rather than treating symptoms alone.
Can Abnormal Menstruation be Treated?
Yes. Treatment depends on the underlying diagnosis and may include:
- Lifestyle modifications
- Hormonal medications
- Iron supplementation (when needed)
- Treatment of thyroid disorders
- Management of PCOS
- Medications to reduce menstrual bleeding
- Surgical treatment for selected uterine conditions
Your gynaecologist will recommend the most appropriate treatment based on your individual needs.
The Bottom Line
An abnormal menstrual cycle isn't always a cause for concern, but persistent changes should never be ignored. Understanding the 8 types of abnormal menstruation can help you recognize early warning signs and seek timely medical care.
At Narayana One Health, our experienced gynaecologists provide comprehensive evaluation and personalized treatment for women experiencing abnormal menstruation, helping restore menstrual health and overall well-being.
Frequently Asked Questions
1. What is abnormal menstruation?
Abnormal menstruation refers to menstrual cycles that are unusually heavy, light, painful, irregular, too frequent, too infrequent, or associated with bleeding between periods.
2. What is the most common cause of abnormal menstruation?
Hormonal imbalance is among the most common causes, though pregnancy, PCOS, thyroid disorders, fibroids, and other medical conditions may also contribute.
3. Can stress cause an abnormal menstrual cycle?
Yes. Physical or emotional stress can temporarily affect hormone levels and lead to changes in the menstrual cycle.
4. When should abnormal menstrual bleeding be evaluated?
Seek medical attention if bleeding is unusually heavy, occurs between periods, lasts longer than seven days, or is accompanied by severe pain, dizziness, or symptoms of anemia.
References
- American College of Obstetricians and Gynecologists. Abnormal Uterine Bleeding.
- International Federation of Gynecology and Obstetrics. FIGO Classification System for Abnormal Uterine Bleeding.
- National Institute for Health and Care Excellence. Heavy Menstrual Bleeding: Assessment and Management.
- World Health Organization. Women's Reproductive Health.
- Munro MG, Critchley HOD, Fraser IS. The FIGO Classification of Causes of Abnormal Uterine Bleeding. International Journal of Gynecology & Obstetrics. 2018.
- Williams Gynecology, 5th Edition. McGraw-Hill Education.