On October 17, Heechul shared a lengthy post via Instagram, where he revealed he's still suffering from the side effects of the past car accident. The idol explained the ongoing pain is, unfortunately, causing interference in his wish to promote with Super Junior.  

The full post by Heechul reads as follows:

"First, I'm writing this with an apologetic mind to my members as I promised not to leave mysterious posts on SNS. 

People who know are aware but I'm unable to properly use my left leg due to a car accident 11 years ago.

But I still joyfully promoted, and I smiled no matter how bad it hurt. But I guess it's because a long time has gone by... I'm starting to get scared. Like I've said on 'Life Bar' recently, the pain in my ankle has become more frequent. 

I've forced myself to laugh and just let it slide when people around me jokingly say, 'It should be healed if it's been more than 10 years~', 'You're just making excuses to get out of dancing, aren't you?'. I've been on variety shows since I've debuted, and in a way, I lived a stable and happy life due to variety shows... I've always thought I need to give laughter and show an indifferent self. 

I tried to have positive thoughts and control my mind by thinking, 'I'm okay', 'I'll get better' but I ended up feeling more pain when my body didn't keep up. So in conclusion, Super Junior is making a comeback on November 6. It's a long-awaited comeback so our members, fans, and everyone are hyped.. including myself.

However, I don't think I'll be able to engage in promotions as normally. I once again deliver my apologetic mind to my members and the fans who've waited for a long time... but I just don't have the confidence... I can't stand to face my members and fans as I've always had these thoughts in my mind.

If I can use and be understood by the excuse of, 'I'll actively promote on variety shows instead!', I'll smile and receive physical therapy with an even more grateful mind, and cheer up. I now complete the lengthy message with an apology to those who might be uncomfortable after reading my selfish post. 

Everyone, be careful of the cold and no matter how lazy you are, please wear a seatbelt when riding a car. 

Thank you."