Can adenomyosis cause irregular periods?

Yes. Adenomyosis can contribute to irregular bleeding patterns, especially when it causes abnormal uterine bleeding—such as heavier flow, prolonged periods, spotting between periods, or cycles that feel less predictable than they used to. Because the tissue within the uterine muscle still responds to hormonal cycling, it can trigger inflammation and bleeding that doesn’t follow a clean “start and stop” pattern.

That said, irregular periods aren’t specific to adenomyosis, and many people have more than one factor at play (for example, fibroids or endometriosis can overlap and intensify bleeding and pain). If irregular bleeding is paired with painful periods, pelvic pressure/tenderness, fatigue from heavy bleeding, or fertility challenges, it’s often worth a focused evaluation. Our team can help you make sense of your symptoms and imaging options (ultrasound and, when helpful, MRI) and then walk you through treatment pathways that match your goals—whether you’re trying to preserve fertility or looking for more definitive relief.