Boychuk went feet-first into the end wall in the third period against the Carolina Hurricanes on Saturday. He returned to the game but wasn't able to take part in the morning skate with the Bruins on Monday.
"He didn't skate this morning because he can't," Bruins coach Claude Julien said. "Right now he's too sore, so he's day-to-day. It's from obviously the incident [Saturday], and so he couldn't skate this morning. He came in early and we tried to see if he could and he couldn't."
Boychuk has three goals, 20 points and a plus-30 rating in 63 games.