Hand flapping in autism is a common behavior observed in individuals with autism spectrum disorder (ASD) and is often one of the early signs that parents or caregivers notice. While it may seem unusual to those unfamiliar with autism, hand flapping serves different purposes for individuals with autism, often as a way of expressing feelings or regulating sensory experiences. In this guide, we’ll explore what hand flapping in autism means, its potential causes, and effective strategies to support individuals who display this behavior.