I HAVE A BAD RASH THAT WAS MISDIAQGNOSED AS LICHEN

i HAVE A BAD RASH THAT WAS MISDIAQGNOSED AS LICHEN SCLEROSI for 6 months, my gyn ckd me today it is on my upper inner legs and along my butt now. she is sending me to a dermatologist. she said it might be a skin disease/problem and I can't remember what she called it. I think it starts with s, it is treatable with oral meds & topical cream. what do you think it might be, I just want to know the name of what she said and it will not be on my online account for several days