Methotrexate Failure

[myname]

After years of complete resolution of skin issues, I suddenly have had an area on my arm recur. A plaque about 2 inches in diameter and some scalp issues as well. I take 0.8 of 25mg/ml sub cu weekly. Also take the prescribed folic acid daily
I have researched everything I can find that might address this MTX therapy failure... and found no information discussing this.
Has anyone here had this issue? and if so what were you able to "do" about it?
Thank you.