If your baby has had a blocked nose for several days and has red bumps on their face and head but no fever, there is no need for a medical consultation. One helpful technique to reduce coughing and mucus in children with a blocked nose is to use a saline solution and a syringe (without a needle). The amount of water to use varies depending on the age of your child. Following the recommended technique and using the solution a few times a day can lead to a significant improvement in symptoms within 48 hours.