Are you sure it's the word 'twitch'? Among the symptoms of stuttering, there are symptoms of 'companion movements', which are subconscious behaviors or body coordination behaviors. For example, when using stronger force, the teeth will be clenched and the hands will unconsciously clench. The accompanying movements in stuttering are such as stomping, waving, blinking, vocal cord or mouth shaking, etc. These are all subconscious behaviors. These behaviors exist with the symptoms of stuttering. If there is no stuttering, there will be no such movements. However, long-term accompanying movements will make this behavior become an independent state. Whether there is stuttering or not, the accompanying movements will appear. At this time, the symptoms have become muscle stress behavior, and it is not controlled by oneself. 'Twitch'. Basically, one in 20 people will have such a situation, which is very troublesome to deal with.