Boy group B1A4's member Sandeul revealed that he received surgery on February 5 for knee cartilage damage.

A representative stated, "Sandeul was feeling a lot of pain around his knees so he received a check-up at the hospital. It was revealed that he had knee cartilage damage. He went into surgery right away on February 5 and he is currently getting rest at home."

The representative continued, "Fortunately, B1A4 is not active with an album right now so he is recovering well at home. There will be no changes in schedules that were already set up, but dancing may be hard for him."

Photo Credit: WM Entertainment