10Lung Cancer
In lung cancer, tumors or growths would spread to different areas around your chest. This leads to unexplained pain that can be unrelated to coughing. The sensation would get worse when you are breathing deeply, coughing, or laughing. In addition, it might trigger shortness of breath and phlegm. Whenever you cough up phlegm or blood, keep in mind to seek immediate medical attention as it is a common sign of lung cancer. [10]
