TEEN TOP's Changjo sat down with 'International bnt' for an interview. 

Discussing his idol life of 7 years, Changjo revealed that he went through many struggles. He said, "I had bipolar disorder. When one thing went down, everything felt like it was bad, and even when I got a little mad I felt angry all day. I also had insecurities about my looks, so I went on a severe diet. I ate one meal a day or ate salad in place of a meal."

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He continued, "I had bad acne too, but I took care of it with saline solution. I placed cotton balls with saline solution on sensitive spots and my skin improved in just 3 days. The part [of my face] that I am most insecure about is the jaw line. I envy the face shape of Lee Jun Ki sunbaenim."