Why Do Autistic Children Flap Their Hands ? Causes and Insights into Stimming Medical Disclaimer: The information on this website is provided and intended for general knowledge only and should not be regarded as a substitute for medical care or professional medical advice, evaluation, diagnosis, or treatment The site does not recommend self - management of health problems. Contact your doctor promptly if you have any questions about health issues. Never delay or ignore medical advice based on information you may have read on this site Hand flapping, spinning, jumping, and similar stereotyped movements are part of the restricted and repetitive behaviors (RRBs) seen in autism Known as stimming, the extent of these movements may vary depending on the child. It’s important for families to understand the underlying cause of this behavior What Is Stimming ? Stimming consists of the repetitive movements or sounds children with autism make These movements may include : • Flapping the hands • Tiptoeing • Running or rocking back and forth • Spinning around in circles • Posturing (for example, arching the back while seated) • Repeatedly opening and closing doors (or turning the lights on and off) • Chewing on objects • Lining up toys Sometimes stimming involves visual or auditory stimulation, including verbal tics. Many children with autism will look sideways, closely observe a spinning object, or flutter their fingers near the eyes. Others will listen to the same song - or make the same noise — over and over again Visit the C.A.T. Center for more information.