Senator Dianne Feinstein of California was hospitalized on Tuesday afternoon after a fall at her home in San Francisco and returned to her residence after an examination showed no serious injuries, her spokesman said.

Senator Feinstein, 90, tripped over a chair in her kitchen around 1 p.m., according to her office.

She was admitted briefly to the University of California, San Francisco Medical Center “as a precaution,” Adam Russell, her spokesman, said on Wednesday. He added that she remained there for an hour or two until doctors determined that her scans were clear.

Ms. Feinstein’s health has been a growing issue since February, when she was hospitalized with a severe case of shingles, the complications of which kept her at home until May. She has relied heavily on staff members to perform her duties on Capitol Hill this year, and she is now at home for the congressional recess.

TMZ first reported that Ms. Feinstein had suffered a fall. Mr. Russell called the incident “minor.”