With the minimum of fuss, Werenski applied a towel to halt the bleeding, before being escorted down the tunnel.
He shared a picture on his Twitter after the game, during which he scored, and his followers were treated to look at his bruised face and enlarged nose.
The caption the 19-year-old added to his snap was: "Playoff hockey", as if those words were explanation enough.
To make matters worse for Werenski, his Blue Jackets side were beaten 5-4 in overtime.
Despite the side from Columbus taking an early 3-1 lead, the Pens stormed back to put themselves into a 3-0 lead in their first-round NHL Eastern Conference playoff series.