What is breakthrough bleeding?
A woman with breakthrough bleeding has vaginal bleeding that occurs between regular menstrual periods. Breakthrough bleeding is most commonly seen as a side effect of birth control pills. Other conditions that cause a change in the level of the sex hormones may also trigger breakthrough bleeding.

What are the symptoms of breakthrough bleeding?
Most cases of breakthrough vaginal bleeding is very light, resulting in vaginal spotting.

How does the doctor treat breakthrough bleeding?
In most cases, breakthrough bleeding can be treated with a change in birth control pill dosage or preparation.