Autism spectrum disorder (ASD) is a group of neurodevelopmental disorders that cause social, behavioral, and communication challenges. ASD is usually diagnosed in childhood, when signs and symptoms appear. Receiving a diagnosis in adulthood is rare. A diagnosis of ASD includes several conditions that were once diagnosed separately, including: autistic disorder Asperger’s syndrome pervasive developmental disorder not otherwise specified (PDD-NOS) People with ASD often have problems with emotional, social, and communication skills. Some signs of ASD include: trouble relating to others restricted or repetitive behaviors aversion to being touched difficulty expressing needs or feelings
