SEE ALSO: KNK's Hyunjong unable to attend 'KNK KINGDOM: TAIWAN' due to health issues

On April 20, YNB Entertainment issued an official statement through KNK's fan cafe to relay the information that Youjin is currently suffering from panic disorder.

The following is the statement by the agency:

"Hello, this is YNB Entertainment. First of all, we would like to say thank you to Tinker Bells who always show love to KNK. We are writing this to inform the fans, who continue to show support as they wait for a next album, of unfortunate news. KNK's Youjin has recently been diagnosed with panic disorder during a visit to the hospital and that it would be difficult for him to continue his activities for some time. We made the decision that our artists' health is a top priority, and therefore, Youjin will focus on his treatment for the time being. As of right now, KNK will continue to promote at 4 members. Also, we will work to the best of our abilities for Youjin's quick recovery. We apologize to Tinker Bells who have been waiting for a news of KNK's album, and we ask you to continue show support and love towards KNK. Thank you."

Get well soon, Youjin.