The idol underwent surgery for his fractured right elbow, and also revealed experiencing pain in his knee and chest. It seems he has been discharged from the hospital now, and is recuperating through physical therapy.
He posted a short clip to his Instagram, showing him carrying out the motions of the therapy instructions given to him. He also wrote, "After leaving the hospital, [you] start physical therapy :)."
We hope to see Jun.K recover and return to the stage at his earliest convenience!