Chronic describes conditions that are long-lasting, persistent, or recurring over extended periods—typically defined as lasting three months or longer. Chronic diseases include conditions like diabetes, heart disease, arthritis, asthma, and many mental health conditions. Unlike acute conditions that come on suddenly and resolve quickly, chronic conditions require ongoing management. Chronic disease management is a significant focus of healthcare systems because these conditions account for most healthcare costs and affect quality of life for millions of Canadians. Prevention through lifestyle factors (diet, exercise, not smoking) can reduce chronic disease risk, while proper management helps people with chronic conditions live well.