Big Boi is having his worst week ever. The Atlanta rapper injured himself during a concert performance in Illinois Sunday night (May 26).

Big Boi is currently headlining the Shoes for Running tour with fellow ATL rhymer Killer Mike. The 'Shutterbug' rapper went on his blog Monday (May 27) to inform fans in St. Louis that a scheduled show would be postponed.

"Injured my leg on stage yesterday, headed to the A for some rest #TooTurntUp #Turndownforwhat…," he wrote.

There's no word on how serious his leg injury is but a rep for Big Boi said that he will undergo tests to find out the extent of the damage.

It's unclear if the Shoes for Running tour is still a go or not.

According to his itinerary, Boi's next stop is Nashville on Thursday (May 30), Chattanooga, Tenn., on Friday (May 31), Mobile, Ala., on Saturday (June 1) and Birmingham, Ala., on Sunday (June 2).

Big Boi is on tour supporting his latest album, 'Vicious Lies and Dangerous Rumors.'

We wish him a speedy recovery.