Teen star Austin Mahone has been hospitalised with a nasty bout of influenza.

The What About Love hitmaker checked in to a medical centre on Thursday (17Oct13) to seek treatment and shared a photo of himself in a hospital bed, hooked up to an intravenous drip.

In the accompanying caption, he wrote: "I've never felt so bad."

The illness has also forced 17-year-old Mahone to delay the start of his first headlining tour, which was due to kick off in Miami, Florida on Thursday night.

Taking to his Twitter.com page late on Wednesday (16Oct13), he wrote, "Mahomies (fans) I'm so so so sorry but I have to reschedule the shows tomorrow in Miami and in Orlando (on Friday)... I can't believe this is happening its my first tour I'm so upset.

"I feel like I'm letting you all down... Its Doctor's orders I have a bad flu 103 (degrees Fahrenheit) fever and I can't move. If I could go I would... The Miami show is now Tuesday Oct 22 & Orlando is Friday Nov 1 (sic)."