O'Connell Street Dental Clinic in Waterford, County Waterford

This article explains how stress activates the brain–body stress system—especially the HPA axis and sympathetic “fight-or-flight” response—releasing hormones like cortisol that, over time, can disrupt mood, sleep, memory, and immune function. It summarizes what research shows about stress-related changes in key brain areas (amygdala, hippocampus, prefrontal cortex) and how chronic stress can increase the risk of anxiety, depression, and physical health problems through inflammation and altered stress hormone patterns. For patients and caregivers, it highlights practical value: recognizing common signs of harmful stress, understanding measurable indicators (such as sleep quality, heart rate variability, and cortisol rhythms), and knowing that evidence-based supports—like structured routines, physical activity, social connection, mindfulness, and clinical care when needed—can help restore balance. The goal is to offer clear, trustworthy insights that make it easier to talk with health professionals, track stress over time, and choose strategies that fit individual needs.