Your lungs help your blood get the oxygen it needs and remove carbon dioxide. The lungs include a network of tubes (bronchi), smaller tubes (bronchioles) and small air sacs (alveoli).
Lung cancer occurs when cells in the lungs grow in ways that aren't typical. These cancers often begin in the cells that line these tubes.
Some people show early signs of lung cancer. Others don't have any symptoms until cancer advances. Lung cancer symptoms may include:
- Chest pain
- Fatigue or weakness
- Persistent coughing (or coughing up blood)
- Repeated respiratory infections like bronchitis
- Trouble breathing