Senator Dianne Feinstein has been hospitalized in San Francisco with a case of shingles, KRON4 has confirmed.

“I was diagnosed over the February recess with a case of shingles,” Sen. Feinstein told KRON4 through a spokesperson. “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.”

Feinstein, 89, recently announced she would not be seeking a new term in the upper house of Congress, but would see out the remainder of her current one.

Shingles is described as a viral infection that causes a painful rash that “can occur anywhere on your body,” according to the Mayo Clinic. Although not life-threatening, it can be “very painful,” the Mayo Clinic also states.

It is not known which hospital in San Francisco the senator is being treated in. She is expected to make a full recovery.