Low ferritin, folate and borderline B12

Hi everyone,

I have rrms been diagnosed since 2010. I went doctors as i was bruising easy. My ferritin is 10, my folate is 3.5, and my B12 is 112, normal tange starts 111. Also some other symptons but not persistant come and go. I am on Tecfidera, been on it for about 3 years. The only side effect was burning face now and again. For a few years. Now when i take Tecfidera i get burning face and rash on my arms. Only some times. Anyone have problems with the above, thankyou.