How do I get my earrings to stop hurting?

Why does my earring keep hurting?

Often the piercing is re-traumatized when earrings are taken in and out of the ear. So, if you experiencing sore ears from wearing earrings, and the pain goes away when you do not wear earrings, the reason is most likely that your body has developed a contact allergy to the metal in the earrings.

How can I make my earrings more comfortable?