Gerrard, 31, has been ruled out until September due to an
infection related to his troublesome groin problem.
The England midfielder had been undergoing rehabilitation
following groin surgery in mid-March.
Reds boss Kenny Dalglish expected him to be back in time for the
first game of the new Premier League campaign against Sunderland on
August 13.
But the club have now confirmed the latest setback will leave
Gerrard on the sidelines for around a month.
An official statement said: "Gerrard today began a course of
antibiotic treatment for an infection related to an ongoing groin
problem.
"He is expected to remain in hospital for several days while the
precautionary procedure is completed.
"The player will then return to Melwood to continue his
rehabilitation programme and is expected to be available for
selection in September."