Alzheimer’s disease affects how a person thinks, feels and experiences the world. Along with memory and cognitive changes, up to 70% of people with Alzheimer's disease also experience behavioral symptoms, which can appear at any stage of the disease. These symptoms may be distressing for both the patient and their caregivers, often affecting the practical, physical and emotional aspects of daily life. It can be helpful to remember that symptoms are the result of real, physical changes in the brain and not a reflection of your care.