Chronic disease refers to long-lasting health conditions that typically persist for three months or longer. These diseases often require ongoing medical attention and can limit daily activities. Common examples include diabetes, heart disease, and asthma. Unlike acute diseases, which are severe but short-term, chronic diseases can be managed but not always cured. The causes of chronic diseases can vary and may include lifestyle factors such as poor diet, lack of exercise, and smoking. Genetics and environmental factors also play a significant role. Managing chronic diseases often involves a combination of medication, lifestyle changes, and regular medical check-ups to monitor health.