Montreal Canadiens goaltender Carey Price revealed he has received treatment for substance abuse.

The 34-year-old said he entered a residential facility last month after having reached "a very dark place" following years of "neglecting" his mental health.

Price had only just returned to the Canadiens following surgery on a knee injury during the off-season.

"Over the last few years I have let myself get to a very dark place and I didn't have the tools to cope with that struggle," he said via an Instagram post.

"Last month I made the decision to enter a residential treatment facility for substance use. Things had reached a point that I realized I needed to prioritize my health for both myself and for my family. Asking for help when you need it is what we encourage our kids to do, and it was what I needed to do.

"I am working through years of neglecting my own mental health which will take some time to repair; all I can do is take it day by day. With that comes some uncertainty with when I will return to play.

"I appreciate all of the overwhelming support and well wishes. I please ask that the media and our hockey community continue to respect our privacy at this time. Your support and respect of this so far has been a critical piece to my recovery."

Price, a seven-time NHL All-Star and Olympic gold medallist in 2014 with Canada, helped the Canadiens to their first Stanley Cup Finals appearance in 28 years last season, where they lost 4-1 to the Tampa Bay Lightning.

He posted a .901 save percentage last season, a figure he improved to .924 during the Canadiens' playoff run.

Speaking on Monday, coach Dominique Ducharme said: "I haven't met him yet. I need to see him. I'll see him tomorrow.

"He wants to come back and play, but there's other things to manage. We talked about the injury that he was coming back from, getting back in shape, and playing shape too. There's many steps to be taken, but he wants to play. He wants to be part of our group. He wants to help out."