How to protect your ears?

If you are wearing some metal earrings and your ears get red after some time. Or get blistery rash. It shows that you are having sensitive ears. 
People with sensitive ears, should use Vaseline before wearing the earrings and on earrings tip. It will work well for helping to slid your earrings into your piercing. 
Putting Vaseline to your earring posts will act as a barrier to your skin.