Bronchial asthma and COPD (Chronic Obstructive Pulmonary Disease) are obstructive pulmonary diseases that affected millions of people all over the world.These two illnesses have many similarities and many differences which may sometimes confuse therapists in the diagnostics and management of these diseases which affect more and more people every year worldwide.Asthma typically is an attack that causes your airways to become inflamed and irritated due to an allergen -- particles like dust or pollen that cause an allergic reaction.Although asthma and COPD have many similarities, they also have many differences.COPD is not asthma.Asthma is not COPD.