The laparoscopic surgery, a minimally invasive procedure involving a small incision in the abdomen, was Tuesday night. Surgeons cleansed her abdominal area and closed a one-centimeter hole caused by the ulcer, McGrath said.
Bush went to the hospital as a precaution Tuesday night after experiencing some abdominal pains. Former President George H.W. Bush was with her.
Current first lady Laura Bush, Barbara Bush's daughter-in-law, said Wednesday: "She's doing great. George and I talked to both President Bush and Barbara Bush last night while they were in the hospital and they were both doing very well then."
Barbara Bush is 83.
She was the girl who, swept off her feet by a handsome Navy aviator, dropped out of college to marry him, "the first man I ever kissed."
They had had their first child, George, while still at Yale in 1946. A daughter, Robin, died in 1953 of leukemia a few weeks before her 4th birthday. The other Bush children are sons Jeb, Neil and Marvin, and daughter Dorothy.
Mrs. Bush disclosed she was suffering from an overactive thyroid ailment known as Graves' disease when she lived at the White House. The disease causes teary eyes and double vision in Mrs. Bush, according to her doctors.