The National Institute of Mental Health (NIMH) provides an overview of Autism Spectrum Disorder (ASD), a developmental condition that affects communication, behavior, and social interaction. The page explains common signs and symptoms, how ASD is diagnosed, and the importance of early identification. It discusses treatment approaches, including behavioral therapies, educational supports, and interventions tailored to each child’s needs. NIMH emphasizes that there is no single cause of autism, but research continues to explore genetic and environmental factors. The resource also offers guidance for families, caregivers, and educators on accessing services and supporting individuals with ASD throughout their lives.