The shoulder injury that cost Kyrie Irving two months has flared up again, potentially putting the rest of his season in question.

Irving wasn’t with the Nets for their first post-All-Star break practice because he was off seeing another specialist. It’s a given he won’t play Thursday at Philadelphia, but the question now is whether he’ll play at all in 2019-20, or get the surgery he opted against back in December.

“He’s still having issues with his shoulder. He is going to see a specialist this week. That’s about all I can tell you,” coach Kenny Atkinson said. “I don’t expect him to be available for Thursday. His shoulder continues to bother him. That’s kind of the extent of it for now.”

Irving has missed 33 of the Nets’ 53 games this season, including the past five with a sprained knee. He’s about to miss a bunch more.

He sat out 26 straight earlier this season with a shoulder impingement suffered Nov. 4. He saw a specialist in Arizona for that ailment before grudgingly getting a cortisone shot on Christmas Eve.

At the time, Irving had been presented with a choice of the cortisone shot or arthroscopic surgery that could potentially end his season. He picked the shot, knowing that it was a short-term fix. That term apparently has expired.

“I think the issue right now is the shoulder. I think that the knee was getting better, but the shoulder is a concern now,” said Atkinson, revealing that the injury has continued to plague Irving and the guard has tried to play through it. “Listen it’s been bothering him. Again, the shoulder is a tough thing, I told you.

“I’ve been through it and I just think it’s an on and off thing where some days it’s bothering you and some days you feel good and some days you don’t feel good. So it got to the point where let’s see another specialist and be sure about this, and that’s kind of where we are.”

Both the Nets and Irving knew they’d get here eventually. On Jan. 4, Irving intimated as much.

“The next progression was get a cortisone shot or you get arthroscopic surgery,” Irving said that day. “The cortisone shot lasts as long as it can. You either continue to get cortisone shots, which is obviously detrimental to your health in your muscles, or you go get arthroscopic surgery.

“It’s just about being able to go back out there after the right amount of rehab, the right amount of rest, recovery, and see what we can do for the rest of the season and then reevaluate after a few months.”

Now the rest of the season is in doubt.

“Of course somebody who is such a great person, obviously the person you go out with every day, you worry about him when it comes to surgery talk and things of that sort,” teammate Taurean Prince said.

“But Ky is one of the most positive people I’ve ever been around this whole process of me knowing him, meeting him since he signed, I’m sure it’s just another testament to his book. It’s time for other guys to step up and be the players that they feel they want to be along with trying to help us win as many games as possible down the stretch.”

Atkinson tried to steer around any questions concerning the rest of Irving’s season.

When asked if or when he expected Irving to return, Atkinson said: “We’ll see. We’ll get the information from the specialist.”

When pressed whether the guard was done for the season, he said: “I don’t want to go there. I don’t feel comfortable saying that.”

After joining Kevin Durant in picking the Nets in free agency last offseason, Irving inked a four-year, $136 million deal. He has averaged a career-high 27.4 points and 6.4 assists, but has played just 20 games in his debut Nets season. He may not play another.

“I don’t know what the duration he’s out besides Thursday. We’ll see what is going on,” Spencer Dinwiddie said. “Obviously we just pray for his health. That’s all you can do.”