Smith, 22, told ABC News that a doctor advised he receive suspension microlaryngoscopy surgery. He is expected to make a full recovery and be back in six to eight weeks.
"Dear all: I am very upset to announce I have been battling to get my vocal cords better the last 10 days but unfortunately they haven't recovered and I am going to need surgery," the Grammy winner said.
"I'm so gutted to be missing all the shows and events I was meant to be playing at. The doctors say I will be back in 6-8 weeks and I cannot wait to sing for you all soon," he said.
Earlier this week Smith posted a picture of himself and the caption said he was upset over having to miss more performances.
"Very upset about Japan and Manilla dates. 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****** horrid," he wrote on Monday.