<s>[INST] I am 19 years old. I am very healthy with my eating and very active I am a professional dancer. I have been smoking for 4 months cigarettes only 1-7 a day. I stopped 4 days ago, and am now having a lot of coughing, spitting up flem, scratchy lungs, and sore throat, and low energy. I just want to know is it possible that I have lung cancer. [/INST] HelloThanks for the query to Chat Doctor. Forum. Cough, scratchy lungs, expectoration (phlegm) sore throat, 19 years age, smoking history, these symptoms may be due to .1 Asthmatic allergic bronchitis (smokers cough), diagnosis can be confirmed by physical examination (as due to bronchoconstriction there develops whistling sound, tightness in chest) . Due to allergy to smoke there develops cough with infection causes expectoration.2 Bronchiectasis, diagnosis can be confirmed by X-ray chest .3 Tuberculosis, diagnosis can be confirmed by sputum examination with X-ray chest. In my opinion this is not a case of lung cancer but deal according to above-mentioned reasons. So consult a physician and get his opinion. Good luck. </s>