That little bump on the outside of your ear canal is called the tragus. It's made of cartilage, and the funny thing is, it doesn't really do anything! But it does make it easy to tell if you have swimmer's ear because if you do, your ear will hurt when you touch your tragus.
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2014 The Nemours Foundation/KidsHealth. All rights reserved.