Does the mole on the back of my ear look cancerous? (photo)

The best thing to do about this growth is to see a Dermatologist who can take a closer look. They will decide from there if it looks dangerous and if they would send it in for testing and how to go about removing the growth. Be sure to use sunscreen when out in the sun even for a short time.

Based on your picture, the mole appears likely to be benign. However, to be safe, you should
be carefully evaluated by a dermatologist. 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 for Diameter greater than a pencil eraser; and E for
a growth that is Evolving or changing. Moles on the ear like yours can easily be removed by a dermatologist using a "shave" biopsy technique which typically
leaves a minimal scar. The mole can then be checked microscopically for
reassurance.