Anxiety is a prevalent and often debilitating condition for individuals on the autism spectrum. This book promotes a multidisciplinary approach to intervention and treatment of the condition, providing professional understanding of the underlying causes and available treatments. With chapters co-authored by well-known advocates and pioneering researchers, contributors examine factors including sensory processing issues, sleep impairments, and the crossover between the autonomic nervous system and immune system. The book expands upon current areas of research, including immune activation and the role of environmental toxicants, dietary and nutritional support, the treatment of gastrointestinal disorders, and individualized methods of managing stress and anxiety.