Linear skin marks after tummy tuck with slightly raised texture, do you have an idea what this is? (Photo)

About 5 months after my procedure in May 2022 I started to feel a rough patch above my belly button. It has now been 2 years since drainless tummy tuck and they have grown upwards- forming lines. Texture is slightly raised. I have noticed they darken as I get closer to my period and then almost go away once it starts, only to begin coming back immediately. My PS along with 2 different dermatologists have looked at it and can give me no answers. Does anyone have any idea what this is?