Markings around butt? (graphic image)

[kaylachristine]

Hi everyone,
My girl has had this marking on her butt for maybe a month or so. Just gave her a bath today, and we soaked a long time, didn’t come off. It doesn’t seem to bug her. It’s not poop. I’ve put coconut oil on it but doesn’t loosen up. Just wondering what this is. I searched the forums but couldn’t find anything I thought matched up. Thanks in advance!

 

[Catzzzmeow]

It could just be natural pigmentation or perhaps yeast, but usually there is more than that. But here is an older thread I found as well. Dark red/brown butt ring
Keep us updated

 

[Toa and Ross]

Difficult to say but looks like normal pigmentation

 

[Yoda mom]

@kaylachristine hello
Checking in for updates