Hi Dr.
My mom went to the hospital in Oct. with a sever head pain starting in the base of the head. It radiated up towards the top of her head which lasted for weeks and she went to the hospital. There she had a cat-scan, MRI, MRA, and blood work done. All came back negative for anything unordinary. Since she has had 2, 3-4 day headaches, with the same exact symptoms. This was after being prescribed Prednisone, because it was thought she had Vasculitis. This past tues the 20th more blood work was done and no inflammation was found. Now she's being sent to a neurologist for tests. Other symptoms she's having are muscle weakness, nausea, blurred-vision, and lethargy. Do you have any thoughts on what this may be?