![](/img/logo/vendor/harvard-health-logo-long.png)
Symptom Checker
Step 4: Read and complete the decision guide to learn more about your symptoms.
Heavy Menstrual Periods
You may have an underactive thyroid called hypothyroidism.
Contact your doctor. A simple blood test can determine if you have an underactive thyroid.
You are almost finished. There are a few other causes which you should be aware of.
Click here to finish the guide.
Related documents
Disclaimer: This content should not be considered complete and should not be used in place of a call or visit to a health professional. Use of this content is subject to specific terms of use & medical disclaimers.