Being a professional hockey player requires being in close proximity to ice all the time. It's only natural to get a runny nose from time to time in the cold. The only problem is, with gloves and pads and everything else, it isn't exactly easy for hockey players to wipe their noses. Fortunately there are teammates around for that.
David Legwand had a problem and fortunately teammate Marcus Foligno provided a shoulder to wipe on.