Singer Sam Smith is heading to the US to see a specialist after pulling out of more dates following the discovery of a haemorrhage on his vocal cords.

The star, 22, pulled out of the rest of his Australian tour last week, after doctors discovered the problem.

Now he has posted an image of himself looking glum and sitting next to a bay, saying that he had to cancel gigs in Japan and Manilla too.

"Very upset about Japan and Manilla dates," he wrote.

"I've just left Australia and I'm on my way to the States to see a specialist to see what to do from there... This is f***ing horrid."

The Grammy award-winning singer recently revealed that he had been "vocally exhausted".

Last week, Smith wrote on his Instagram page: "I am deeply, deeply saddened to tell my Australian fans, I have to cancel my Australian tour.

"I have been vocally exhausted for a while now, however last night in Sydney I had a small haemorrhage on my vocal cords.

"The doctors have told me I need to fully rest until my vocal cords have healed, otherwise this could become a huge, long-term issue."

The Stay With Me singer apologised to fans who have bought tickets and said new dates would be announced, before signing off: "This kills me."

The In The Lonely Hour tour is set to continue later in the US and Europe.