A tiny amount of Vapor Rub (sore bought or homemade) under the nose can help with the problems of a runny nose and the soreness that comes from blowing your nose all the time when you have a bad cold. The eucalyptus and menthol (or peppermint if homemade) in the rub help with the congestion, can ease a runny nose and are anti-inflammatory, antiviral and healing to skin. The base of the rub, whether from the store or homemade, helps with the skin irritation from tissues from blowing your nose so frequently by moisturising and protecting the skin.
I've done this for myself a great many times and it does seem to help. I will say that Vapor Rub does sting when you first apply it but it fades after a bit especially the next time you blow your nose. Also try not to apply too much as the aromas can make the eyes water and sting if you apply too much.
