what does an endo flare up feel like to you?

I’m doing an art piece on endometriosis and am trying to find things to symbolize the pain to incorporate within the work. I have always described my pain to feel like deep abdominal bruising and like someone is shoving a sword up my hooha. Does anyone have any other comparisons that I could visualize?

UPDATE!!: The piece is complete and is up on my art account. Please feel free to check it out and leave a comment on what you think. Thank you all for being so vulnerable and sharing your experiences.

https://www.instagram.com/p/DDNIZSXpdxY/?igsh=OHF2cjF6dXZlcDg5