Generalized Anxiety Disorder: Why Your Brain Won't Stop Worrying

Why does your brain keep worrying, even when there's nothing more to figure out? Everyone worries. But in Generalized Anxiety Disorder, worry keeps moving from one subject to the next — and it can start to feel less like a problem and more like protection. In this video, we look at Generalized Anxiety Disorder: what researchers mean by intolerance of uncertainty, why worry can feel like preparation, how it can be reinforced when nothing goes wrong, and what clinicians look for when worry becomes persistent, difficult to control and starts to interfere with daily life. You'll learn why worry keeps changing the subject, why checking and reassurance rarely deliver the certainty they promise, how worry affects the body as well as the mind, and three practical principles from Cognitive Behavioural Therapy — giving worry an appointment, telling a problem from a possibility, and practising small doses of "I don't know." Not every physical symptom is anxiety — symptoms that persist are worth having checked by a health professional. Watch next: The Geography of Fear: Why Does Your Body React Before You Think? —    • The Geography of Fear: Why Does Your Body ...   Why You Feel Weird After a Panic Attack —    • Why You Feel Weird After a Panic Attack   About LivingLongWell The science of living well, explained simply. LivingLongWell turns scientific research and trusted health sources into clear, engaging videos about how your mind and body work. AI-presented. Human-directed and human-reviewed. Sources American Psychiatric Association — Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR) (2022). Generalized Anxiety Disorder criteria. Borkovec, T. D., Alcaine, O., & Behar, E. (2004). "Avoidance theory of worry and generalized anxiety disorder." In Generalized Anxiety Disorder: Advances in Research and Practice. Guilford Press. Borkovec, T. D., Wilkinson, L., Folensbee, R., & Lerman, C. (1983). "Stimulus control applications to the treatment of worry." Behaviour Research and Therapy. Carleton, R. N. (2016). "Into the unknown: a review and synthesis of contemporary models involving uncertainty." Journal of Anxiety Disorders. Carpenter, J. K., et al. (2018). "Cognitive behavioral therapy for anxiety and related disorders: a meta-analysis of randomized placebo-controlled trials." Depression and Anxiety. Cuijpers, P., et al. (2014). "Psychological treatment of generalized anxiety disorder: a meta-analysis." Clinical Psychology Review. Dugas, M. J., Gagnon, F., Ladouceur, R., & Freeston, M. H. (1998). "Generalized anxiety disorder: a preliminary test of a conceptual model." Behaviour Research and Therapy. Harvard Medical School — Anxiety and Stress Disorders, Special Health Report (© 2025). Hoehn-Saric, R., & McLeod, D. R. (1993). "Somatic manifestations of normal and pathological anxiety." In Biology of Anxiety Disorders. American Psychiatric Press. Kessler, R. C., Berglund, P., Demler, O., Jin, R., Merikangas, K. R., & Walters, E. E. (2005). "Lifetime prevalence and age-of-onset distributions of DSM-IV disorders in the National Comorbidity Survey Replication." Archives of General Psychiatry. Ladouceur, R., et al. (2000). "Efficacy of a cognitive-behavioral treatment for generalized anxiety disorder: evaluation in a controlled clinical trial." Journal of Consulting and Clinical Psychology. LeDoux, J. E. (2015). Anxious: Using the Brain to Understand and Treat Fear and Anxiety. Viking. McEvoy, P. M., & Erceg-Hurn, D. M. (2016). "The search for universal transdiagnostic and trans-therapy change processes: evidence for intolerance of uncertainty." Journal of Anxiety Disorders. National Institute for Health and Care Excellence (NICE) — Generalised anxiety disorder and panic disorder in adults: management (CG113). National Institute of Mental Health — Generalized Anxiety Disorder (prevalence, National Comorbidity Survey Replication). https://www.nimh.nih.gov/health/stati... Newman, M. G., & Llera, S. J. (2011). "A novel theory of experiential avoidance in generalized anxiety disorder: a review and synthesis of research supporting a contrast avoidance model of worry." Clinical Psychology Review. Shin, L. M., & Liberzon, I. (2010). "The neurocircuitry of fear, stress, and anxiety disorders." Neuropsychopharmacology. Verkuil, B., Brosschot, J. F., Gebhardt, W. A., & Thayer, J. F. (2010). "When worries make you sick: a review of perseverative cognition, the default stress response and somatic health." Journal of Experimental Psychopathology. Important LivingLongWell is for education only, not medical advice. Our videos cannot diagnose you or replace care from a qualified health professional. If you are in immediate danger or thinking about harming yourself, contact your local emergency services or a crisis support service. © LivingLongWell. All rights reserved.