What can you do for a congested 5 month old baby?

Nasal or chest congestion? You should keep the nose clear with normal saline nose drops, and a nasal aspirator. Use them especially before your baby eats, so he can breathe through his nose while his mouth is busy with the food. That is the best you can do. Please don't use any over the counter decongestants or cough medicine for any child under the age of 5 yrs. Recently the Food and Drug Admin took them all off the shelves because they tend to harm more than they help. If the child is congested and coughing, if you don't have a humidifier, you can run the hot water in the shower and sit in the bathroom (NOT the shower) with your baby for not more than 5 min per hour- the moist heat will help with congestion as well. Give your baby plenty of fluids, some fever reducer (Tylenol, Motrin for infants) if he has a fever. If he does not improve in 24 hrs or gets worse, please go to your pediatrician to make sure it's not something more serious.