In the book "Chicken Soup for the Soul: The Story Behind the Song", Aguilera revealed the occasion, theme and meaning of "Fighter". She talked about her "very chaotic and abusive" home, where she did not feel "safe". In school, Aguilera was picked on and alienated because of her musical passion. However, it made her become "smarter and stronger". To release herself, Aguilera started to write songs at the age of 15, both music and lyrics; and it was the way how she found her voice. The writing process of "Fighter" began during her promotion for her debut album in 1999, when she was "a part of the big craze pop phenomenon". According to Aguilera, her debut album helped her a lot to develop the process. She wanted to make an "emotionally rich and positive empowering" song, especially for women, in order for them to speak for themselves be strong. About the idea of the track, she revealed, "I was coming up with titles and ideas and deciding what I wanted to write about. I had to sit down and make sense of my feelings and experiences. I learned a lot from the first record that helped me to develop. I took the good and the bad and considered some of the choices I made and became better because of it.