looks a lot like what I had .. ridges and valleys (welps) ... if I am seeing the pics right ... came on very quickly ... lasted a month ... exstream itching ... has mostly gone now but has left scars and patches of thick skin .... I was on lamotrigine and doxipen ... I stopped the doxipen (our suspect as I had changed doseage) ,,, and reduced the lamotrigine ... I offer no suggestion to any action you should do ... I had three doctors and they all disagreeded what it was ... where it came from ... they did agree to reduce hot showers .... remove any allergent (whether you have ever been allergic or not) ... move to a (skin plus soap .. I use olay...) ... I was using a rx skin cream and had a steroid shot ....

If you have any "concern" please see a doctor ... only a doctor can dx you ....