Zac Efron says he struggles badly with agoraphobia

"Something about that experience burned me out. I had a really hard time recentering. Ultimately, they chalked it up to taking way too many diuretics for way too long, and it messed something up," he said. The actor, who shot to fame in 2006 for his role as Troy Bolton in High School Musical, also quashed rumours that he had undergone plastic surgery. In 2013, he managed to shatter his jaw after slipping in his home while running in socks and smashing his jaw into the granite corner of a fountain. In April last year, the internet wondered whether Efron had had plastic surgery on his face, to the extent that his mum asked him if this was true. But Efron explained that in fact what had happened was that his masseter muscles "just got really big," after he took some time off from the physical therapy for his jaw. He tries to avoid social media because "if I valued what other people thought of me to the extent that they may think I do, I definitely wouldn't be able to do this work."