<s>[INST] about a week ago i felt like i had the flu it only lasted fro a day but now am left with this gurgeling crackling sound when i breath out (just out) hard along with a slight itchy throat & cough i m a smoker & 60 yrs old i ve had cancer2x breast & tonsil but did a pet scan 2 yrs ago & came back great so what could this be? [/INST] Hi there,Without examination and proper evaluation whatever information I'm providing  here is at best an educated guess. You should see your doctor if the symptoms persists.It sounds like you are having  hypersensitive airways after flu. Also possible is infection of the lungs and bronchitis as you are continuing to smoke. With past history of double malignancy and in case of doubt if the doctor doesn't think its because of infection, getting a plain Chest xray is not a bad idea either.Regards </s>