I think it’s allowed. Just don’t make it too extreme and give trigger warnings in the beginning or in every chapter. It’s a form of self harm but if you don’t heavily portray it/make it extreme, you should be fine since it says any self harm graphic and detailed is against the guidelines.
Moved to Creator’s Corner since this is not about coding. Make sure to check out our Forum Tutorial for more info about creating topics, and feel free to PM me if you’ve got questions.