My doctor says that my three year old needs a root canal. What should I do?

Well! The kids of this age undergo pulpotomy and not root canal. I think your child is too young to go for pulpotomy and you should wait for another year or so and then think about it. You can take a second opinion from the dentist to be sure about things. http://www.aae.org/patients/treatments-and-procedures/root-canals/root-canals.aspx http://www.deardoctor.com/articles/root-canal-treatment-for-children/page2.php