My 4-month-old child has had a productive cough for the past 4 days. What can I do to help?

To help your 4-month-old child with a wet cough, it is most effective to clear their nose of mucus that is dripping down their throat and causing them to cough. You can try using the technique outlined in the following link: [link]. This should be done several times a day for a couple of days to see improvement in their cough.