Alveoli are tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going. Although they’re microscopic, alveoli are the workhorses of your respiratory system. People ...

Hyperinflated lungs are larger-than-normal lungs as a result of trapped air. It happens when you can’t exhale, or push out all of the air that’s in your lungs. The air gets trapped and takes up space, ...

A pulmonary contusion or lung contusion is a bruise in or on your lungs caused by blunt force to the chest. It is different than the tearing of lung tissue because a pulmonary contusion doesn’t affect ...

Restrictive lung diseases are chronic conditions that limit the ability of the lungs to expand during inhalation. This reduces the amount of air that the person can breathe in. A range of chronic ...

When lung tissue becomes inflamed from an infection or other cause, cells called histiocytes cluster to form nodules called granulomas. They may not cause any symptoms but may have an underlying cause ...

A calcified granuloma in the lung is a cluster of immune cells with calcium deposits. They can be asymptomatic or cause symptoms such as wheezing and chest pain. A granuloma is a small cluster of ...

Cigarette smoke can have wide-ranging health effects on the body, and the lungs and airways are two of the hardest-hit areas. But the good news is that after a person quits smoking, the lungs can heal ...