Stuttering is a communication disorder involving disruptions, or "disfluencies," in a person’s speech. The word "stuttering" can be used to refer either to the specific speech disfluencies that are 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 say, 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: National Stuttering Association

5%
5%of children experience a period of stuttering that lasts six months or more.
3/4ths
3/4thsof those who stutter recover by late childhood.
1%
1%of the population stutter through adulthood.