tldr -- Nobody knows. When you say "goes away for a few days" do you mean your stutter is having a good day or your stutter is non-existent and you are fluent? I have good/bad cycles all the time but I've only been fluent 3x in my life; once at age 30 for 3 months, at 37 for 3 weeks, and just recently! How old are you? If you're young and are experiencing true fluency then this may be a recurring event for you. If these are just good/bad days then that's just how it goes. It's awesome being fluent. I don't expect it to last but I'm enjoying it as much as I can. I've taken on more responsibility at work because it's easier to ask the things I don't know. (I usually rely on email.) I'm also talking the ears off my friends! I feel the blocks but they don't manifest. I just push right through them. *feelsgoodman* I make the analogy of talking to a maze. When you stutter, your path in the maze comes to a dead end and you're stuck but when fluent the dead-ends are replaced with saloon doors and they just swing open. All that said, I'm fully prepared to stutter again in a few hours/days/weeks/months. I'm just grateful for the time I have now.