Still, bleeding between periods is atypical.
Bleeding between periods becomes more worrisome if you regularly pass large blood clots.
What Is Abnormal Uterine Bleeding?

Illustration by Laura Porter for Verywell Health
Your healthcare provider may ask you questions about your period to find out what is causing your irregular clotting.
Next, your healthcare provider may do a pelvic exam.
In fact, one study found that about 63% of those who experienced heavy periods also had anemia.
Symptoms of anemia may include:
Your healthcare provider may need to diagnose and treat these symptoms, too.
Your healthcare provider may also recommend surgery if medication hasnt remedied the issue.
Tell your healthcare provider about abnormal uterine bleeding to ensure diagnosis and treatment.
Summary
Passing blood clots while on your period may not be anything to worry about.
Any abnormal uterine bleeding between periods requires diagnosis and treatment.
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