Why Does My Ear Feel So Sensitive?

Well, I have gotten second piercing on my lobes in both of my ears. It has been probably a little longer than 4 weeks since I had gotten them. My right ear was never a problem. It went through the normal pain, swelling when it was irritated, and this was only up to two weeks after I had gotten the piercing.

My left ear, on the other hand, is suddenly always irritated. It's been irritated and itching for the last week and a half. On top of that, My whole left ear is now tender to the touch. When I touch the lower half of my ear where the piercing is and the tragus area, it is really achy. The inside is worse. It isn't so bad when I don't touch my ear. When I do, I cringe. I also "felt inside" and it feels like theres some type of...hard something inside.

Is this an ear infection? What could have caused this?