After being treated for a foot injury sustained while walking on a Hawaiian shore, Jill Biden, first lady, left Walter Reed National Military Medical Center Thursday evening.

Michael LaRosa, a spokesperson, said that the first lady had stepped on an object at the beach last weekend before her official events in Hawaii. It became lodged in her left heel.

LaRosa later said that she had “a successful procedure performed on her left foot to flush debris from a punctured wound.” Doctors examined the wound and couldn’t determine the cause, but they said that the wound was clean and free from infection. It is expected to heal well.

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She was joined by President Joe Biden at Walter Reed. The couple then returned to the White House via motorcade.

The first lady had stopped in Hawaii on her way back from the Tokyo Olympics over the weekend and met with military families and encouraged residents to get vaccinated.

In April, the 70-year-old first Lady underwent an unrelated medical procedure at an outpatient facility in Washington.