Thanks for the query
Noisy breathing in a initial month of infancy is very common. Most of the time it is due to nasal blockade and due to weak muscle of throat that produces this sound. If there is no other features like feeding difficulty, fever
or breathing problem then no need to worry. Just put Nasivion
saline nasal drops 1 drop alternatively in each nostril
at an interval of 10-15 mint 5-6 times a day particularly before feeds. Never put drop in both the nostril simultaneously as infant mainly breathe through nose and that will cause blockade of both nostril leading to more breathing difficulty.
Observe for breathing or feeding difficulty, fever if you notice any problem consult your doc immediately.
I hope this answer your query well
Wish you and your family good health