Sen. Dianne Feinstein (D-CA) announced that she was hospitalized on Thursday and is receiving treatment for shingles, leaving Senate Democrats without an outright majority this week as two other senators are also away from the Capitol.

Feinstein confirmed her hospitalization on Thursday after her spokesperson announced she was leaving D.C. for California to focus on a “health matter.”

“I was diagnosed over the February recess with a case of shingles. I have been hospitalized and am receiving treatment in San Francisco and expect to make a full recovery. I hope to return to the Senate later this month,” the 89-year-old California senator said.