A long-term illness is a health condition that persists for an extended period, often defined as lasting three months or more. These illnesses can be chronic, meaning they may not have a cure and require ongoing management. Examples include diabetes, asthma, and heart disease. People with long-term illnesses may experience various symptoms that can affect their daily lives. Treatment often involves medication, lifestyle changes, and regular medical check-ups to monitor the condition. Support from healthcare professionals, family, and friends is crucial for managing the challenges associated with long-term illnesses.