Philip Treacy the Fashion Design course at the Royal College of Art in London, and graduated in 1990 with first class honours. In 1989 he took one of his hats to Michael Roberts, fashion editor of "Tatler" magazine, and his style editor, Isabella Blow. Blow asked Treacy to make a hat for her to wear for her wedding, and soon after, invited him in 1990, to live with her and her new husband Detmar Blow, in their Belgravia London home, where Treacy worked in their basement. Alexander McQueen, another Blow discovery, would also join Treacy in her home. "The Telegraph" would chronicle
Patrick Treacy in Cork in 2005. In April 2016, the High Court in Dublin granted a possession order over Treacy's clinic buildings in favour of a bank-appointed receiver. In June 2016, Treacy made a €137,897 settlement with the Irish Revenue as a result of unpaid taxes, interest and penalties. Treacy met Michael Jackson in 2006 after Jackson sought him for cosmetic treatment after reading about his experience with HLA fillers and his charitable work in Africa. He was Jackson's personal dermatologist and developed a friendship with the singer. Treacy and Jackson worked on humanitarian projects together. In 2011, Treacy became an ambassador