Abreu was admitted to the hospital on Tuesday and released Wednesday. White Sox manager Rick Renteria says Abreu is resting at the team's hotel. He won't play in the series against the Indians.
The 31-year-old first baseman spent three weeks on the disabled list (Aug. 22-Sept. 9) after undergoing surgery to repair a testicular torsion. He was activated Sept. 10 and is hitless in his last 20 at-bats.
Abreu was selected to his second All-Star team this season and is batting .265 with 22 homers and 78 RBIs in 128 games.