Just a random thought. I've had helix piercings in both ears for almost 6 years and tragus piercings in both for about 2-3 years. Most of the time they feel fine but they randomly get achy. I happen to be talking to someone and she said hers do the same thing. I have quite a few piercings and have taken care of them well. My cartilage piercings are the only ones that give me trouble sometimes.