One Direction band-mate Niall Horan is apparently having surgery next week for a problem he's had since childhood, according to J-14 magazine. The source writes that The Sun first reported Horan's upcoming surgery saying:
According to The Sun, Niall's knee has dislocated for years, which is very uncomfortable and painful to have to deal with. With all of the moving around and dancing he does on tour, he wanted to make sure he's all ready to go before they hit the road again.
Best of luck to Niall and we hope for a speedy recovery!