Children with stuttering show difficulty in articulation, repetition in speech, blushing, discontinuous and fluent speech, lingering on a word for too long, accenting or dragging out a word, or they may show sudden stops in the middle of speech or dragging out a word for a long period of time, especially when they are emotionally agitated, and they may be in a hurry to get the words out. Stuttering can be categorized into transient stuttering, benign stuttering and permanent stuttering. Transient stuttering refers to the stuttering phenomenon that occurs when infants and toddlers are learning to speak, which can be corrected as long as the parents are patient for a few months, and is called transient stuttering. Benign stuttering is stuttering that occurs in children between the ages of 3 and 6 years old, and can disappear after the age of 6 years old, known as benign stuttering. Permanent stuttering refers to children after the age of 7 who repeat the first word of their speech, sometimes lightly, sometimes heavily, with long and unclear word sounds, and often need to use facial or body movements to help them speak, which is called permanent stuttering.