<s>[INST] hello, I am 20 years old healthy male without any history of breathing problem. Last week I went for a Bar B Q...and the following night i developed a breathlessness problem...I am not able to breathe normally...I am taking short breaths....I had my lungs xray done which turned out to be normal..blood tests and ecg are normal too...blood pressure is normal as well..i want to know what is the exact problem and how many days can it take until i can breathe normally...Also i do not have any fever or pain in the chest...only short breaths...thank you. [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Barbecue causes plenty of smoke exposure. So when you inhale smoke, this can because irritation and inflammation of the airways. This is known as bronchitis. It is not seen with all individuals but some exposed persons can develop. And bronchitis can cause similar shortness of breath. So in my opinion, you are mostly having bronchitis. So better to consult pulmonologist and get done 1. Clinical examination of respiratory system 2. PUT (pulmonary function test). PFT will not only diagnose bronchitis, but it will also tell you about severity of the disease and treatment is based on severity only. You will mostly improve with inhaled bronchodilator and inhaled corticosteroids (ICS). Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>