Bergeron's head collided with Colin Greening's elbow or forearm as the Boston center tried to prevent Greening from getting off a shot in the slot.
Bergeron, last season's Selke Trophy winner as the NHL's top defensive forward, began the night with a team-high 31 points. In his career, Bergeron has accumulated three high-profile concussions, starting with one in 2007 that forced him to miss two-thirds of the regular season and the Stanley Cup Playoffs.
Bruins coach Claude Julien offered no update on Bergeron's condition after his team's 3-2 victory.
“I haven’t talked to him yet, but we all what kind of guy and kind of player he is," Bruins forward David Krejci said. "We don’t have to talk about it. It (stinks), but I hope it’s nothing serious and he’s going to be back in the lineup very soon."