On Sunday, it had been revealed that Boyle had been advised by a doctor to take a break.
The TalkbackThames television company issued a statement that said: "Following Saturday night's show, Susan is exhausted and emotionally drained.
"She has been seen by her private GP who supports her decision to take a few days out for rest and recovery."
Gerry Boyle, who is Susan Boyle's brother denied the rumours that his sister suffers from mental health problems.
Susan Boyle recently became internationally famous after she sang I Dreamed A Dream in the Britain's Got Talent show, and many people thought she would be the winner of the finals in which she performed the song again.
Boyle's original performance of the song was viewed by millions of people on YouTube and other sites, and because of her incredible singing talent and "instant" fame she was invited to be a guest on the Oprah Winfrey show.
