when i laugh even for a short period of time such as 10 seconds i cough so hard that my chest vibrates. my insides such as my lungs and backs feel itchy. i am really puzzled as i am a 16 year old in full health and i regularly undertake exercise 4-5 times a week. why is this happening?
Thanks for your question on Chat Doctor. I can understand your concern. No need to worry much for your symptoms because you are young, healthy and exercising normally. So possibility of lung related diseases is very low. Itching in lungs with coughing are seen in lung infection and bronchitis. So better to get done chest x-ray and PFT to rule out lung infection and bronchitis respectively. If both are normal then no need to worry about lung diseases. Some deny Chat Doctor.  So