The symptoms of lung cancer does not usually appear in the early stages of lung cancer but arise when it has already spread too much to increase the chance of cure. In fact, since that occurs the first malignant cell until a person consult a doctor first before symptoms of the disease can take many years.

Among the most common symptoms are:

- Persistent cough.
- Chest pain that increases with breathing.
- Loss of weight and appetite.
- Shortness of breath.
- Wheezing or whistling.
- Spitting up blood or redness (mucus).