The 92-year-old wife of George HW Bush has recently had a series of hospital stays.
Former first lady Barbara Bush, 92, in failing health
Spokesman Jim McGrath said the decision had been reached after consulting with her family and doctors. He did not elaborate as to the nature of Mrs Bush's health problems.
Barbara Bush health failing
Mr McGrath says Mrs Bush is surrounded by "a family she adores" and appreciates the many kind messages and prayers she has been receiving.
Video: Former First Lady Barbara Bush in failing health
Former first lady Barbara Bush to end medical treatment amid failing health
"Mrs Bush, now age 92, has decided not to seek additional medical treatment and will instead focus on comfort care," he said.
"It will not surprise those who know her that Barbara Bush has been a rock in the face of her failing health, worrying not for herself – thanks to her abiding faith – but for others."
Things to Know About Former First Lady Barbara Bush
Mrs Bush is one of only two first ladies who was also the mother of a president. The other was Abigail Adams, wife of John Adams and mother of John Quincy Adams.
Video: Barbara Bush in “failing health”
She married George HW Bush in 1945. They had six children and have been married longer than any presidential couple in American history.
Eight years after she and her husband left the White House, Mrs Bush stood with her husband as their son George W Bush was sworn in as president.
Outpouring Of Support For Barbara Bush After News Of Failing Health
By PTI | Published: 16th April 2018 12:03 PM |
Former US first lady Barbara Bush foregoes medical treatment as health fails
Former President George H.W. Bush embraces former first lady Barbara Bush.(File |AP)
Barbara Bush, Wife of Former President Senior Bush, in Failing Health
Ailing US former First Lady Barbara Bush, who is in "failing health", has declined further medical treatment and will spend her time in "comfort care", a family spokesman has said.
Barbara Bush in failing health, to focus on comfort, family spokesman says
Bush, 92, is being cared for at her home in Houston and has decided she does not want to go back into the hospital. She has been on oxygen for some time, spokesman Jim McGrath said.
The statement did not indicate the nature of Bush's illness but said that she had had a series of recent hospitalisations.
"Following a recent series of hospitalisations, and after consulting her family and doctors, Mrs Bush has decided not to seek additional medical treatment and will instead focus on comfort care," McGrath said in a statement.
Her husband, former President George H W Bush is with her, as are a daughter Doro and sons Marvin and Neil.
Her other sons, former President George W Bush and former Governor Jeb Bush, have been in and out visiting her the past week.
McGrath said she has been treated for decades for Graves' disease, which is a thyroid condition.
Houston cantina photos capture Barbara Bushs zest for life and love of children
She also had a heart surgery in 2009 for a severe narrowing of her main heart valve and was hospitalised a year before that for surgery on a perforated ulcer.
"It will not surprise those who know her that Barbara Bush has been a rock in the face of her failing health, worrying not for herself thanks to her abiding faith but for others," McGrath said.
Video: Barbara Bush, former first lady, in failing health
"She is surrounded by a family she adores, and appreciates the many kind messages and especially the prayers she is receiving," he added.
Her husband, at 93, is the longest-lived US president. George H W Bush, the nation's 41st president, has also suffered health issues, and spent a period in intensive care for pneumonia last year.
He suffers from a form of Parkinson's disease and uses a wheelchair. The couple have been married for 73 years.
Their son, George W Bush, was elected president in 2000 and served two terms as the nation's 43rd president.
Barbara Bush is the only woman to have seen both her husband and son sworn in as US president.