When should one consult a doctor?

One should consult a health-care provider if he or she develops the symptoms associated with lung cancer, in particular, if they have

• a new persistent cough or worsening of an existing chronic cough
,


• blood in the sputum,



• persistent bronchitis or repeated respiratory infections
,


• chest pain
,


• unexplained weight loss and/or fatigue
,


• breathing difficulties such as shortness of breath or wheezing.