Ideas? Well, plugged duct, bad latch, infection of some kind (tho I don't know what

) Does it hurt? Swollen? Red?
I got a perfectly straight row of them with J, and it was from a slightly-off latch. I had them for a week-ish. They didn't hurt yet, but probably would have. And the "plugged duct" idea... sometimes, especially in the beginning, it seemed as though there was literally some dried milk "stuck" for lack of a better term. It didn't hurt, either, and with a bit of working was able to remove them.