Arteritis is very rare, and it usually occurs in people over about 66. A good friend diagnosed it in herself at about 39/40 years of age. Of course nobody would believe her (despite the fact that she's a maven, a programmer, very smart, and so forth) for ten years. Ah, yes, the vagaries of diagnosis.
Just a couple of links on it.
One is from Neuroland, which has Neurology information for physicians & health professionals.
