Module 5 Lesson 1. Introduction to behaviour changes 1. Behaviour changes that may be particularly stressful Dementia changes the way people behave, think or act. This not only affects the person living with dementia, but can also be distressing and upsetting for carers, like you. ”Any behaviour that gets you or the person you care for upset is stressful.” In this introduction you will learn: How you can identify behaviours that are potentially upsetting, stressful or difficult for you and the person you care for. How you might handle behaviour changes. How you might change circumstances to reduce or prevent behaviour changes.