The problem of the stutterer is that he has contractions in the diaphragm, which in turn cause stuttering due to fear or the diaphragm getting used to the way of speaking (stuttering). Relaxing the diaphragm is one of the most important things that stop stuttering The problem is not a physical problem (a problem of the tongue, mouth or jaw), but rather a psychological problem I will show you in private some videos of hopeless people (Those who have the most difficult and complex cases of stuttering) How they were and how they became with the same approved methods.