A chronic disease is a long-term medical condition that persists over an extended period of time and typically requires ongoing medical management and treatment. Chronic diseases can be caused by a variety of factors, including genetics, lifestyle choices, environmental factors, and other underlying health conditions. Examples of chronic diseases include diabetes, heart disease, cancer, arthritis, and asthma. These conditions often require ongoing medical care, lifestyle modifications, and medication management to help manage symptoms and prevent complications. Chronic diseases can have a significant impact on a person's quality of life and can lead to disability or even death if left untreated.