Grammy Award-winner Sam Smith, who last month postponed some concert dates after a small hemorrhage was found on his vocal cords, must now undergo surgery for the condition.

The "Stay with Me" singer, who turns 23 on May 19, wrote "Bad news" Thursday on social media. "I have my operation booked for next week, so getting really nervous. But by doing this in 8 weeks time I'm gonna be able to sing like never before so it's worth it. I am so sorry to all. Dreading the next month thou, I can't speak for THREE WEEKS after the op."

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An accompanying text image on Instagram reads, "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. 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."

Smith's website listed canceled concerts from May 7 to June 28 in Tokyo, Manila, Paris and Monaco. The next show, in Suffolk, England, on July 3, is sold out, and tickets remain available for the show after that, in Arras, France, on July 5. The English singer's global tour, which includes U.S. dates but none in the tri-state area, continues through Sept. 13.

Smith -- who won 2014 Grammy Awards for Record of the Year, Song of the Year, Best New Artist and Best Pop Vocal Album -- announced on April 28 that following discovery of the vocal-cord hemorrhage, doctors warned him that, "I need to fully rest until my vocal chords [sic] have healed, otherwise this could become a huge, long-term issue." He had added that a series of canceled Australian concert dates would be made up in December.