Quick Answer
Irregular periods can happen for many reasons, including stress, hormonal changes, PCOS, thyroid problems, weight changes, excessive exercise, certain medicines, and pregnancy. Occasional changes may not be concerning, but repeated irregular periods should be evaluated, especially if they are accompanied by heavy bleeding, pelvic pain, unusual hair growth, acne, or difficulty becoming pregnant.
What Is an Irregular Period?
A menstrual cycle does not have to occur on exactly the same date every month.
The cycle can naturally vary between women and from month to month. However, periods may be considered irregular when the timing changes significantly or periods repeatedly become unusually frequent, infrequent, prolonged, or unpredictable.
Common Causes
One common cause is hormonal imbalance.
PCOS can affect ovulation and lead to irregular or missed periods. Thyroid disorders can also influence menstrual cycles.
Other possible causes include:
- Stress
- Significant weight gain or weight loss
- Excessive exercise
- Poor nutrition
- Certain medications
- Perimenopause
- Pregnancy
- Some reproductive health conditions
The cause cannot be identified from the menstrual pattern alone.
Can PCOS Cause Irregular Periods?
Yes.
PCOS can interfere with regular ovulation. Women with PCOS may experience:
- Irregular periods
- Acne
- Excess facial or body hair
- Weight gain or difficulty losing weight
- Hair thinning
However, having irregular periods does not automatically mean you have PCOS.
When Should You See a Doctor?
Consult a gynecologist if irregular periods continue or represent a significant change from your usual pattern.
You should particularly seek evaluation if you also have:
- Very heavy bleeding
- Severe period pain
- Bleeding between periods
- Bleeding after sex
- Pelvic pain
- Unexplained weight changes
- Excess facial hair
- Difficulty becoming pregnant
What Tests May Be Needed?
Depending on your symptoms, a doctor may recommend pregnancy testing, blood tests for hormones or thyroid function, pelvic ultrasound, or other investigations.
Treatment depends on the underlying cause.
FAQs
Can stress delay periods?
Yes. Significant or ongoing stress can affect the hormones involved in ovulation and menstruation.
Are irregular periods always caused by PCOS?
No. There are several possible causes.
Can thyroid problems affect periods?
Yes. Both underactive and overactive thyroid conditions can affect menstrual cycles.
Conclusion
Irregular periods are common, but persistent changes should not simply be ignored. Understanding the underlying cause can help your gynecologist decide whether monitoring, lifestyle changes, medication, or further treatment is appropriate.