Circulation issue??

Has anyone else had this happen??

I have no idea what it is or what could have caused it, my husband noticed it in the shower a few days ago. It definitely feels funny, like standing in the shower I can feel hot water on my upper back and butt, but in that area of my back I can’t really feel the temperature of the water.

I have some new scaring on the left side from something about a month ago and I thought that the not being able to feel the temperature of the water in the shower was because of that, since the scars are still a little sensitive. But now I’m thinking otherwise.

I’ll bring it up to my OB at my next appointment in about ten days.. but in the mean time, does anyone have any ideas what this is??