Yes, blocking is certainly one feature of stuttering. You can think about stuttering as a neurological issue in younger children around which layers of negative experience, anxiety, and avoidance can build as you grow up stuttering. Very young children initially stutter with lots of repetitions and little or no awareness that they are stuttering. As they become more aware of their stuttering and try to avoid doing it you see different types of stuttering (e.g. blocks, excess tension). I would argue that a block is your brain trying to avoid stuttering by only speaking when it feels you can say the word perfectly, and of course it cannot always say the word perfectly. As one speech pathologist said “stuttering is what happens when you try not to stutter” (or at least some types of stuttering, e.g. blocking). As far as ways to help with blocking, I personally have found that becoming more comfortable with stuttering (e.g. voluntary stuttering, telling others that you stutter, talking openly about it, avoidance reduction therapy) defuses the situation and results in easier speech (e.g some repetitions instead of blocks maybe but easier speech overall). I would also recommend looking at speech therapy techniques - prolonged speech has good evidence behind it, also look at easy onsets/soft contacts as these can be helpful for blocking. [Stuttering Treatments Info ](http://www.stutteringtherapyonline.com/uploads/7/5/7/9/75794067/fluency_shaping_stuttering_therapies.png)