That's spelled Debi Thomas. We don't know timing of the onset or the specific genesis of Debi's mental problems. She was under a tremendous amount of stress in the lead-up to the 1988 Olympics, which could be seen on her face and in her interviews during that time. She had suffered an injury the year before (1987) as I recall, which contributed to her losing her U.S. National title to Jill Trenary and her World title to Katarina Witt. I personally believe Debi was struggling with pressure in the lead-up to the '88 Olympics. IMO, she never actually recovered from what she seemed under the surface to feel was letting herself down, as well as letting down her coach and her country with her uncharacteristic fp performance. Debi's mother's reaction, and her coach's reaction to her not winning/ not performing to her abilities likely also added to her emotional distress.
IMO, Debi tried to put on a brave face at the time and for years afterward in interviews. But to me it was always clear that she was struggling emotionally with her Olympics letdown and the hectic aftermath of touring with SOI and trying to finish medical school. Post-Olympics, she put on a good front via still competing and winning professional competitions, and performing in shows. However, some of her behavior on tour seemed erratic as recalled by a few SOI skaters years later. Debi likely had always been a high-achiever and a perfectionist who had put pressure on herself. Unfortunately, I don't think she ever stopped to seek professional counseling post-Olympics. She kept going, including rushing into getting married to her boyfriend at the time, which ended in divorce. She married an athlete some years later and had a son. She graduated from Stanford and worked as a physician, but she eventually hit a wall and everything fell apart/ came unglued...
Debi Thomas has been diagnosed with Bipolar Disorder (formerly known as Manic Depression). She joins a long list of high achievers who struggled with Bipolar Disorder including...Robert Schumann, Composer, Virginia Woolf, Author, Kanye West, Entertainer, Mariah Carey, Entertainer, Winston Churchill, Prime Minister, Marilyn Monroe, Actress, Vivian Leigh, Actress, Jane Pauley, Journalist, Franz Schubert, Composer, Sting, Entertainer, Gustav Mahler, Composer, Frank Sinatra, Entertainer, Carrie Fisher, Actress/Author, Amy Winehouse, Entertainer, Ernest Hemingway, Author, Margaux Hemingway, Actress, Brittney Spears, Entertainer, Nina Simone, Entertainer, Glenn Gould, Pianist, Elizabeth Manley, Figure Skater, Vincent Van Gogh, Painter....it's a long list.
List of (famous) people (including Debi Thomas) with Bipolar Disorder:
https://en.wikipedia.org/wiki/List_of_people_with_bipolar_disorder
Before making anymore ignorant statements about Bipolar Disorder, you can read more about it here:
https://www.nimh.nih.gov/health/topics/bipolar-disorder/index.shtml