Allergy Problem can be defined as a medical condition in which the body's immune system reacts to substances that are usually harmless. Asthma is a common allergy problem, which is a chronic lung disease that causes inflammation and narrowing of the airways, leading to difficulty breathing. Symptoms of asthma include coughing, wheezing, chest tightness, and shortness of breath. Treatment for asthma includes avoiding triggers, taking medications, and using inhalers.