An acute disease is a medical condition that comes on suddenly and typically lasts for a short duration. These diseases can be severe and may require immediate medical attention. Common examples include influenza, appendicitis, and acute bronchitis. Symptoms often appear quickly and can be intense, but they usually resolve within days or weeks. Unlike chronic diseases, which persist over a long time, acute diseases are often self-limiting. This means that they can resolve on their own or with treatment. Early diagnosis and intervention can help manage symptoms and prevent complications, making timely medical care essential.