Harry and his band mates are hyperactive.
The One Direction star has been busy with bandmates Zayn Malik, Niall Horan, Louis Tomlinson and Liam Payne on their Take Me Home Tour.
They’ve also been promoting their documentary This Is Us and planning ahead for their next album.
Sometimes 19-year-old Harry finds it difficult to come down from the constant buzz surrounding the band.
"I always feel kind of out of breath," he admitted to the latest edition of British InStyle magazine.
"We've just had a break. I was ill at home for the first five days."
Louis, 21, added: "We're hyperactive most of the time. I think anyone in our position, at our age, would be the same."
It's not just the shows and the constant public appearances that leave One Direction drained.
They have a dedicated fanbase, who never cease to amaze with their attention-seeking antics.
"Someone tried to give me her house keys today," Liam mused.
"There wasn't even an address on them. She just said, 'Take them.' What did she think was going to happen?"
Another follower tried to smuggle herself into the boys' hotel by hiding in a trash can.
"I don't think there's anything weirder than getting into a bin," Niall marvelled.
One Direction rose to fame after appearing on the UK edition of The X Factor.
They didn't even win the show, but have enjoyed colossal success, even breaking into the American charts with their catchy pop songs.
When they do get to take a break from their hectic lives, it means all the more to them.
"[I go to my mom's], where there's tea on the table. When you've been away you appreciate it so much more," Harry smiled.
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