question: Hi there:) I hit the back of my head almost 3 months ago because of a wooden beam I did not see. I have been on Prednisone for a week treatment . I recently went to the doctor and she saw that there was still a bit of inflammation in the back of my head(she believes I suffered a concussion). I am getting pain on the left side of my head that radiates down my neck, to my shoulder and down the rest of the arm. Why is this ? :( I do not have much money so I have not done any scan of whatsoever:/.