Asthma is a chronic disease (meaning that it is ongoing) that affects the lungs. Those afflicted with the disease will experience asthma attacks (or flare-ups), where the airways swell or tighten and produce extra mucus. This may cause coughing or difficulty breathing. The symptoms range from mild to severe depending on the individual.
While there is no known cure, there are mitigation options available. This includes anti-inflammatory medications (often administered through inhalers), bronchodilators (to relax the muscles of your airway), and other therapies.