Niall Horan with problems in One Direction's shows  

The concerts of One Direction are very energetic, and the guys do jumps and dances that tired to anyone. Niall Horan had a problem in the knee last year, and until we saw walking with a cane, but would not fully recovered and feel pain.

'I don't hop count for me for a while! Difficult to introduce myself. Painful, but it is well," said Niall Horan through your Twitter account.

Niall Horan needs an operation, due to the floating ball that has since two years ago; however may not be served until the end of the tour with One Direction, because the recovery is almost 3 months. No way.