Autism spectrum disorder - Symptoms and causes - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/autism-spectrum-disorder/symptoms-causes/syc-20352928
WEBJan 6, 2018 · A child or adult with autism spectrum disorder may have limited, repetitive patterns of behavior, interests or activities, including any of these signs: Performs repetitive movements, such as rocking, spinning or hand flapping; Performs activities that could cause self-harm, such as biting or head-banging
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