A pulmonologist is a medical doctor who specializes in diagnosing and treating diseases of the lungs and respiratory system. They help patients with conditions like asthma, chronic obstructive pulmonary disease (COPD), and pneumonia. By using various tests and procedures, pulmonologists can assess lung function and determine the best treatment options. In addition to treating illnesses, pulmonologists also focus on preventive care and educating patients about lung health. They may work closely with other healthcare professionals, such as primary care doctors and respiratory therapists, to provide comprehensive care for individuals with breathing problems.