Stuttering is a difference in speech pattern involving disruptions, or “disfluencies,” in a person’s speech. The word “stuttering” can be used to refer either to the specific speech disfluencies commonly produced by people who stutter or to the overall communication difficulty that people who stutter may experience.
In addition to producing disfluencies, people who stutter often experience physical tension and struggle in their speech muscles, as well as embarrassment, anxiety, and fear about speaking. Together, these symptoms can make it very difficult for people who stutter to speak, and this makes it difficult for them to communicate effectively with others. There are as many different patterns of stuttering as there are people who stutter, and many different degrees of stuttering, from mild to severe.[ source ]