Kane said it was bothering him before the start of the Stanley Cup Playoffs last season.
"There's one little issue that I've been dealing with, maybe even before the bubble," Kane said Tuesday. "We're trying to figure that out. Hopefully it's nothing too serious. Hopefully we'll just get it fixed and then not have to worry about it next year.
"I feel we've done a lot of good things to make it feel good in games, other games it hasn't felt as great. It's an ongoing process. Hopefully we get to the point where I'm not feeling it at all, I feel strong on the puck and it's not an issue when I'm out there. That's the ultimate goal."
Kane said he'll soon get more information on what needs to be done.
"I've just got some different things to talk about, go through," he said. "We'll figure out more, but I think the past few years I've skated a lot in the summer, played in the (IIHF World Championship), different things. From what I'm hearing now, maybe I'll take more time off the ice, but I don't think it should affect anything I'm doing as far as training, working out. But I'll learn more as we talk through it."
Kane will not play for the United States at the 2021 World Championship, which is scheduled for May 21-June 6 in Riga, Latvia. He wants to spend time with his son, Patrick Kane III, who will be 6 months old Wednesday, and get some rest.