The 90-year-old senator went to the hospital as a precaution after a minor fall in her home.
VIDEO: Feinstein gets confused in Senate Appropriations Committee hearing and has to be prodded to vote
Feinstein gets confused in Senate Appropriations Committee hearing and has to be prodded to vote
Her office says that all of her scans were clear and she returned home.
The last time the oldest member of Congress was hospitalized was back in February, to get treatment for shingles.
That resulted in serious complications, including brain inflammation. This prompted a near-three month absence from Washington.
MORE: Dianne Feinstein suffered brain inflammation as complication from shingles, aide confirms
When she returned to the Senate in May, her office at the time said she was still experiencing some side effects, including vision and balance issues that require her to use a wheelchair at times.
But just a week later, audio was made public from her exchange with a Los Angeles Times reporter where Feinstein appeared to not know she had been away from Washington for months.
VIDEO: Sen. Dianne Feinstein says 'I've been here' despite absence from Capitol Hill
Feinstein says 'I've been here' despite Capitol Hill absence
And near the end of July, there was confusion during a Senate Appropriations Committee hearing. Senator Feinstein was called on to vote for a defense appropriations bill and began reading a statement and continued until an aide whispered in her ear to "Just say aye."
Her office later said she was preoccupied and didn't realize debate had just ended.