When it comes to your heath, knowledge is power. Dr. Freda Lewis-Hall, Chief Medical officer of Pfizer, joins Dr. Phil to answer common medical questions and bust some myths.

First up, Dr. Lewis-Hall explains what causes earaches in children, if they can cause hearing loss and tips for preventing them. And, is it true that cracking your knuckles can give you arthritis? Dr. Lewis-Hall weighs in on this myth.

This episode of Dr. Phil airs Thursday. Watch more here.

For more information on osteo and other types of arthritis, visit GetHealthyStayHealthy.com.