"Getting ready for surgery tomorrow morning," Allen tweeted Thursday. "Gonna get this hand back to 100% no matter what it takes."
Allen, 27, and his wife, Katy, were involved in a nasty car wreck on Tuesday. After the accident, Allen updated fans that he and his wife had made it OK and that they are expecting their first child together. The couple have been married for four years.
On his Twitter account, Allen said he had broken his wrist but assured followers that the injury would not affect his upcoming tour, which was scheduled to kick off Jan. 8 in Vermont. Allen released his latest album, Thank You Camellia, in May.