Thanks for your question on Health Care Magic.
I can understand your concern.
Normally lung sounds clear with out any extra abnormal sound.
But when it sounds like crepitations or rhonchi than this means that there is some problem.
Dense sounds means congested lungs.
And congestion is mostly due to fluid over load.
And fluid over load is seen in cardiac disease like
heart failure and Pulmonary disease like
bronchitis and pneumonia.
So to rule out heart failure, cardiogram and 2d echo are needed.
To rule out Pulmonary causes, chest
x ray and PFT (Pulmonary Function Test - breathing test) are needed.
So better to get done these tests, first diagnose yourself and then start appropriate treatment.
Hope I have solved your query.
Wish you good health. Thanks.