I have had a bump behind my ear for 4 years and it's starting to get worse, what could it be? (photo)

This could easily be a benign growth such as a mole or a cyst but to be safe, you should be carefully evaluated by a
board certified dermatologist. It would be an extremely simple five minute procedure for a dermatologist to remove this growth using a "shave" technique which typically leaves a minimal scar. The growth can then be checked microscopically for reassurance.Please use the ABCDE's as your guide for
when to be concerned about moles: A for Asymmetry; B for
Irregular Borders; C for
Black or uneven Colors; D fordiameter greater than a pencil eraser; and E
for a growth that is Evolving or changing.You can follow the video link below to learn more about identifying the
changes in moles that are suspicious for skin cancer.