<s>[INST] I had a flu with fever 7 days ago , the fever broke then congestion started which lead to coughing. The last four nights is when it hard to breath at night  and the right side where my jugular vein feels swollen.  IS this just a simple bacterial or viral infection in the lungs?? [/INST] Hello got flu 7 days back, for last 4 days there is severe cough with difficulty in breathing. Such type of symptoms may be due to bronchoconstriction (as this produces severe cough and difficulty in breathing) . There develop wheezing sound and rales. When such bronchoconstriction combine with bacterial or viral pathogens there also develop fever. Without proper examination it is very difficult to diagnose, which type of infection, you are having. So consult physician and get his opinion. Good luck. </s>