My son is 1 month old. He is facing little cold. He cough and sneeze less frequent. But his breathing is noisy. And nose is stuff.  He is on zero medication. Other information :- 1. During birth his gestational age was 37 weeks. 2. Weather here goes below 12 degree Celsius during night. 3. Proper protection from direct and cold air is given to him. 4. I have a nebulizer machine too.