Spurs are like this bladder infection that just won't go away.
You get some leftover antibiotics from a buddy, you run them for 4 days, you think it is gone.
Then it comes back with a vengeance and it hurts to pee for another week.
Just when you think it's over, you have a bottle of Mad Dog and it's back all over again.
Spurs are annoying and painful like that.