What counts as irregular
Irregular periods include cycles that vary widely in timing, bleeding that is unusually heavy, long gaps between periods, or bleeding between periods. The concern increases when the pattern is new, persistent, or associated with pain or weakness.
Common medical causes
PCOS is one of the most common causes, but thyroid disease, pregnancy-related problems, hormone imbalance, sudden weight change, and perimenopause can also play a role. A proper evaluation helps distinguish between temporary changes and a pattern that needs treatment.
When to seek urgent help
Heavy bleeding with dizziness, severe pain, fainting, pregnancy with bleeding, or bleeding after long absence should be assessed promptly. These situations may require urgent evaluation.