How to untag yourself from a photo on Facebook with your iPhone?

I'm at a summer camp and my mom tagged me in a pretty embarrassing photo of me, and I'd like to untag myself from it. Unfortunately, all I have is my iPhone and I can't figure out how to do it.

You can't you need to do it on desktop

Go to facebook.com/fullsite or just type in fullsite facebook in google. And do it like you would on the computer

I just checked the Facebook app.
Go to the picture. It should take you to that black screen with the "Like" "comment" and however many comments/likes there are.
Click the comments.
Under the tags, but above the comments/likes, there should be a "report/remove tag"
click it. And it should lead you through from there.

Hope I helped