Aaron Judge has been out for nearly a month with an oblique injury and there’s no timetable for his return.

Carlos Beltran believes Judge may have to deal with the injury for the rest of the season — even when he does get back on the field. Beltran suffered an oblique injury in 2015 and missed nearly three weeks before finishing the second half of the year.

“You have to manage,’’ Beltran said of dealing with the injury, indicating Judge won’t be able to return to full strength during the season.

“I don’t think so,’’ Beltran said. “If he gets to 100%, then that’s great. At least in my case, I never got to 100%. I felt it through the end [of the year].”

That’s what Beltran said he passed along to Judge, who injured himself on a swing on April 20.

“I had a conversation with him about it,’’ Beltran said. “I basically shared my experience, with being able to pull that oblique and the feelings and the things that you have to do and you have to maintain.”

And so Judge and the Yankees will have to decide when to move forward.

“I said to him, at one point, he’ll have to make a decision,’’ Beltran said. “That pain, it won’t go [away] until maybe the end of the season. That’s how obliques work. It’s a muscle you use all the time, especially with all the power he generates from the right side. It’s a muscle that is active all the time: It’s active when you throw, when you run the basepaths.”

The challenge will be figuring out how to get Judge in the lineup without aggravating the injury.

“You have to be smart,’’ Beltran said. “You have to have dialogue with your manager and let them know that ‘I’m sore. If you don’t see me going out there and maybe you don’t see me running 100%, I feel it. I want to be in the lineup’ and the manager has to be able to give him some days here and there to keep him fresh.’’

Still, Beltran is confident Judge will be able to be productive and avoid making it worse when he plays again. It’s something he did well in 2015, his second season with the Yankees.

“He’s a smart player,’’ Beltran said. “I understand that he’ll make a decision when he’s ready.”

Beltran, now special assistant to general manager Brian Cashman, was at CC Sabathia’s PitCCh In Foundation’s celebrity softball game at Yankee Stadium on Thursday and said he’s been impressed by what the Yankees have done in spite of all their injuries.

“I’ve been injured before so I know how it feels,’’ Beltran said. “This is tough for a lot of guys in the clubhouse. At the same time, it’s encouraging for the younger guys, to take advantage of the opportunities that have been given to them.’’

He singled out Gio Urshela, who has filled in at third base in Miguel Andujar’s absence and will now be an even more important part of the lineup after Andujar decided to undergo season-ending surgery to repair the labrum in his right shoulder.

“He’s done a great job at third base,’’ Beltran said of Urshela. “Many others, too. I think we’re going to be in a better position [because of it]. Injuries happen. The fact that it happens so often with so many guys is frustrating. It’s easy a lot of times to point a finger at somebody. But the reality is every team in baseball goes through injuries like that.’’