Stuttering is a communication disorder in which repetitions or abnormal stoppages of sounds and syllables - break the flow of speech. There may also be unusual facial and body movements associated with speaking. International Stuttering Awareness Day, on October 22, shines a helpful spotlight on stutterers and educates the public about the causes. 5 MYTHS ABOUT STUTTERING 1. ​Nervousness While nervousness my cause some to halt their speech, it is not a cause of stuttering.​ 2