Menstrual cycles can vary, and a change in timing or bleeding does not always mean something serious is wrong. However, a new or persistent pattern of irregular periods can sometimes be a sign that a health assessment would be helpful.
Your usual cycle, age, medicines, pregnancy possibility and other symptoms all matter. If you are concerned about a change, a gynaecologist or other qualified healthcare professional can help review possible causes and decide whether further tests are appropriate.
What are irregular periods?
People may use “irregular periods” to describe cycles that vary significantly in length, periods that arrive more or less often than usual, missed periods, or changes in bleeding duration or heaviness. What is expected can vary with age and life stage, including the years soon after periods begin and the transition towards menopause.
Tracking dates and symptoms for a few cycles can help you explain the pattern during a consultation. Do not delay seeking advice just to complete a log if symptoms are severe or worrying.
What can cause periods to change?
Hormonal changes and ovulation
Changes in the hormones that regulate ovulation can affect when a period arrives. Polycystic ovary syndrome (PCOS) and thyroid conditions are examples of issues a clinician may consider when the history and symptoms suggest them.
Stress, activity and changes in body weight
Significant stress, changes in eating patterns, intensive exercise or substantial weight change may be associated with menstrual disruption. These are possible contributors rather than a diagnosis; persistent changes should be assessed in context.
Pregnancy and contraception
Pregnancy is one possible reason for a missed period. Hormonal contraception and some other medicines can also change bleeding patterns. If pregnancy is possible and your period is late, consider a pregnancy test and seek advice about the next step.
Other medical conditions
Long-term illness, some medicines and conditions affecting the reproductive organs can influence menstrual patterns. The possible cause cannot reliably be identified from cycle timing alone.
What information should you track?
- The first day of each period and how long bleeding lasts.
- Whether bleeding is lighter or heavier than usual.
- Pelvic pain, severe cramps or bleeding between periods.
- Changes in acne, hair growth, weight, energy or other symptoms.
- Medicines, supplements, contraception and any recent health changes.
This information may help a clinician decide whether an examination, pregnancy test, blood tests or imaging is appropriate. Not every person needs every test.
When should you seek medical advice?
Arrange a consultation if periods that were previously regular become irregular for several months, your cycle repeatedly comes much more often or less often than usual, your period stops without an explanation, or bleeding lasts longer than expected. ACOG advises evaluation when periods occur more often than every 21 days or less often than every 45 days, when bleeding lasts more than seven days, or when periods are more than 90 days apart even once. Individual circumstances can affect interpretation.
Seek prompt medical care for very heavy bleeding, particularly if you are soaking through pads or tampons rapidly, or if you feel faint, dizzy, weak or unwell. Severe pelvic pain or bleeding when pregnancy is possible also warrants urgent assessment.
What happens at a gynaecology consultation?
Your clinician may ask about cycle history, symptoms, sexual health where relevant, medicines and your medical background. Depending on your circumstances, they may discuss a physical examination, pregnancy testing, blood tests or ultrasound. The choice of assessment should be explained to you and based on your needs.
Treatment depends on the cause, your symptoms and your preferences. It may involve monitoring, treating an underlying condition, or discussing medication and other management options. Avoid taking hormones or stopping prescribed contraception without professional advice.
Take changes in your cycle seriously
If you are concerned about your menstrual health, contact Medwin Medical Center to ask about an appropriate women’s-health or gynaecology consultation. Clear information about your symptoms can help your clinician decide on a suitable assessment.
Further Reading
- American College of Obstetricians and Gynecologists — Heavy and Abnormal Periods
- American College of Obstetricians and Gynecologists — Amenorrhea: Absence of Periods
This article is educational only and is not a diagnosis. Seek urgent care for severe symptoms or heavy bleeding accompanied by dizziness or faintness.
