<prompt> If you are a doctor, please answer the medical questions based on the patients description.i am a 20 year old male. light smoker - 3 cigarrettes a day. recently i have been waking up in the morning with tightnessslight pain in the chest and a weird tightness in the stomach area. also a chronic coughclearing of the throat. this morning i coughed up a small amount of bright blood, which was a bit shocking. what could this be a symptom of? there is no history of lung cancer in my family but i realise this might not mean much..  <response>: Thanks for your question on Chat Doctor. I can understand your concern. Since you are smoker, possibility of bronchitis is more for your hemoptysis blood in sputum. I dont think you are having lung cancer as you are too young 20 years for lung cancer. But better to consult pulmonologist and get done 1. Clinical examination of respiratory system 2. Chest x-ray 3. PUT pulmonary function test. Chest x-ray is must rule out lung cancer. PFT is needed for the diagnosis of bronchitis. You might need inhaled bronchodilator and inhaled corticosteroids ICS. And please quit smoking as soon as possible as this is not a good habit. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. 