If your 1-year-old baby has been experiencing a runny nose for 2 and a half weeks and has been coughing a lot at night for the past 2 days, it is recommended to try using a saline solution to help reduce the amount of mucus dripping from the nose to the throat. You can do this using a syringe without a needle, following specific guidelines on the amount to use depending on the age of your child. This technique can help alleviate coughing and improve symptoms within a couple of days.