Boston Bruins forward Nathan Horton's latest concussion is worse than originally thought.

Horton is suffering from post-concussion syndrome and the team has forced him to stop skating.

In a game against the Philadelphia Flyers on Jan. 22, Horton was hit by Flyers forward Tom Sestito and suffered a mild concussion.

The 26-year-old has not played since that hit, but resumed skating this past Sunday only to have his symptoms, including headaches, return.

"He's been pulled back," Bruins head coach Claude Julien told boston.com. "He's got some symptoms. So we've pulled him back. It's hard for me to come out every day with a step forward, step backward. He's back to square one. We're giving him some time here. Those symptoms, once he got on the ice, came back."

This is not the first concussion Horton has suffered in the past year.

During the Stanley Cup Finals last June, he suffered a severe concussion after being hit by Vancouver Canucks defenceman Aaron Rome in Game 3. Horton missed the rest of the playoffs but recovered in time to begin the 2011-12 season with the Bruins, although he admittedly was feeling some residual effects at the start of the campaign.

In 46 games this season Horton has 17 goals and 15 assists.