Coming to 6 months old, my baby girl is down with running nose. Any remedy or tips?

At this age, a saline nasal spray or drops can help loosen the mucus, and a bulb syringe works well to clear it out gently after. Propping up one end of the mattress slightly can also help her breathe a bit easier at night. That said, since she is only coming to 6 months, it might be good to bring her to see the PD just to be safe, especially if the runny nose drags on or she develops a fever. Better to get a professional to take a look than to second-guess at this age.