like what symptoms do u have to have to have lung cancer like if you dont have it you dont have lung cancer
Shortness of breath, cough, coughing up blood, weight loss, night sweats. or worst of all, no symptoms whatsoever. get a chest xray if you are so worried.
I think this info will help you out. there is a lot of very good information in these links about lung cancer. Including signs and symptoms. Hope this helps