I Have Been Experiencing Scalp Tenderness And Pain For A

I have been experiencing scalp tenderness and pain for a few weeks. It feels like I have combed my hair the opposite direction from which it lays naturally, only a thousand times worse. I would like to know both the cause and a treatment. Of note is the fact that I have RA and had my second infusion of Actemra just over three weeks ago with some other ill effects. I'm just wondering if this could also be an adverse reaction. Thank you!