I had a small lump on the back of my conch piercing, and I used tea tree oil on it. I just swabbed it once or twice a day with a cotton swab and a little of the oil, and within a week it had gotten alot smaller. However, some people are evidentially more sensitive to it, so that could be your problem.You don't need alot, just a little dab.
Have: 2x 18g lobes, 14g inner conch (left), 14g Christina
Want: 1x 10g lobes, 14g navel, 18g nostril, 8g septum, 14g tongue, clavicle dermal anchors