I used to get them a few times a year - not huge ones, but about the size of a big zit - and wow, did they HURT! And yes, depending on where they were, they interfered with my speech.
Fortunately since I started getting treatment (just over a year ago) I have not had any more.
I think they were probably harbingers of a flare, when I look back on it.
Sorry you're having this problem! :-(