My DS is 5 months old and has been congested for over 3 months now. He wakes up at night nearly every hour because of this and I am completely sleep deprived and I have a very lively 3 year old to ...

Babies can have nasal congestion and/or chest congestion. ... But it's okay to offer your baby a little bit of water – about 4 to 8 ounces daily – once they're 6 months old.