It's very common and been happening for years - it's Vicks (other branded menthol solutions are available obviously) and just helps keep the airways open.
Doesn’t look like Puncheon will be playing
https://www.dailymail.co.uk/sport/football/article-6762163/amp/Huddersfield-axe-Jason-Puncheon-furious-bust-manager-Jan-Siewert.html