4 doctors weighed in:
My periods have changed. When should I see a doctor about it?
4 doctors weighed in

3 doctors agree
In brief: Specific changes.
Periods often change becoming longer or shorter, heavier or lighter, or with differing intervals.
As a general rule, you should check with your doctor for menses consistently less than 20 days apart from beginning to beginning, bleeding longer than 7 days or bleeding and spotting longer than 10 days, unscheduled bleeding or spotting between menses, or bleeding heavier than 1 pad per hour.

In brief: Specific changes.
Periods often change becoming longer or shorter, heavier or lighter, or with differing intervals.
As a general rule, you should check with your doctor for menses consistently less than 20 days apart from beginning to beginning, bleeding longer than 7 days or bleeding and spotting longer than 10 days, unscheduled bleeding or spotting between menses, or bleeding heavier than 1 pad per hour.
Dr. Katherine Sutherland
Dr. Katherine Sutherland
Thank
Get help from a real doctor now
Dr. Dennis Higginbotham
Board Certified, Obstetrics & Gynecology
26 years in practice
49M people helped
Continue
107,000 doctors available
Read more answers from doctors