How exactly does asthma affect the body?

Effects... Asthma consists of bronchospasm and inflammation of the airways. Typical signs and symptoms include wheezing, shortness of breath, cough, etc. Asthma patients have exacerbations of disease and between episodes, many patients don't have any symptoms. There is no cure but there are effective treatments.
In many ways. Asthma is an inflammatory disease of the lower airways or lungs. It is defined by its ability to cause swelling in the airways, increase mucous production in the airways, and cause tightening of muscles that surround the airways. By doing so, asthma can decrease exercise tolerance, cause increased rates of pneumonia in certain patients, and can worsen heartburn or reflux.