For many health conditions, people first know something is wrong when they start having symptoms. This is not always the case with cancer. Symptoms of lung cancer, for example, may not appear until the cancer is spreading or worsening. Some people do have symptoms at early stages of lung cancer, but many do not.
To learn more about your risk of lung cancer, talk to your doctor. They can go over your risk factors, provide tips for quitting smoking, or let you know if lung cancer screening is right for you.
American Cancer Society. (2023). Can lung cancer be found early?
American Cancer Society. (2019). Signs and symptoms of lung cancer.