Large indent on left buttock bikini line area

Hello dear!!
Thanks for the question and provided information as well.
Unfortunately, without pictures, it is very difficult to give you a proper answer. l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)

Though the likelihood is low that this would be anything very concerning, I would recommend first making sure you see a doctor who can examine this lesion and make any recommendation regarding the need for a biopsy/removal or imaging. If it is in fact just an irregularity/indent in your tissue, procedures such as scar revision or a small amount of fat grafting are definitely great options to address this.