That can happen. It's not a dumb question at all. Sometimes, I've noticed that once you break a new thong in after awhile, it becomes less constricting in that area. The irritation might be an indication that ordering a size up might help. Most thong-manufacturers are pretty similar when it comes to size, but sometimes they can get a little different. Sometimes I change my posture, as well. I tend to slump, and that puts pressure on that area, so I try to sit up straight more often. I don't know. I hope those suggestions help.