The podcast explains that OCD, affecting 2.5-4% of people, involves a cortico-striatal-thalamic loop that becomes hyperactive, linking obsessions to anxiety and compulsive actions. Engaging in compulsions provides only brief relief while strengthening the underlying obsession. The most effective treatment is cognitive behavioral therapy (CBT) with exposure and ritual prevention, which teaches anxiety tolerance by having patients face their core fears without performing the compulsion. SSRIs can reduce symptoms but are less effective than CBT alone, and combining both does not improve outcomes. Other interventions like TMS show promise in disrupting compulsive automaticity, while mindfulness meditation helps indirectly by improving focus on CBT. The episode emphasizes that the goal is not to eliminate anxiety but to learn to tolerate it, thereby retraining the brain to break the OCD cycle.