Prevalence and Incidence of Neurotic, Stress-Related, and Somatisation Disorders 1. Introduction Neurotic, stress-related, and somatisation disorders are a group of mental health conditions primarily characterized by excessive anxiety, emotional distress, and unexplained physical symptoms. These disorders significantly impact an individual’s quality of life and contribute to a substantial burden on healthcare systems globally. They include: 2. Global and Regional Prevalence and Incidence (A) General Prevalence (Existing Cases in Population) 1.