This essay provides a comprehensive overview of Autism Spectrum Disorder (ASD), delving into its causes, symptoms, and various treatment approaches. The essay begins by establishing the importance of understanding the nervous system, stress, and their impact on mental health, highlighting the potential for stress to affect the nervous system and lead to mental pressure. It then defines ASD as a group of developmental disorders characterized by a range of symptoms, skills, and levels of disability, affecting healthcare stability. The main body of the essay explores the psychological and mental aspects of ASD, emphasizing that individuals with good mental health may still face challenges related to skills and physical disorders. It discusses how stress, headaches, and changes in lifestyle can trigger irritability in individuals with ASD, emphasizing the importance of emotional and behavioral adjustments. The essay outlines the symptoms of ASD, including confusion, suspicion, anger, and social withdrawal, and discusses various treatment methods such as medication and psychotherapy. Furthermore, it explores the impact of ASD on body functioning, including the potential for cell body effects, gene mutations, and epigenetic changes. The essay also covers behavioral values, brain development, and examples of language and learning difficulties associated with ASD. The essay concludes by summarizing the key findings and emphasizing the importance of understanding the causes, symptoms, and treatment options for ASD, including behavioral analysis, DIR approach, and visual cues, to improve outcomes for individuals affected by the disorder.