Hi, Although the chances are very slim that you should have this entity I would counsel you to get to a doctor (neurologist, opthalmologist, or rheumtologist would be ideal for what you re describing) to rule out an entity called giant cell arteritis. As I said, I don t think this is the most likely diagnosis but it is the most important one to make sure you DON T have at this point. Since you re not describing headache symptoms then, I don t believe to be migraine or any variant thereof, however, some lab work and a good examination of the left temple with the inner mucosal surfaces of the mouth would be a good idea. Hope I have answered your query. Let me know if I can assist you further by sending questions to me at www.bit.ly/drdariushsaghafi. Regards, Dr. Dariush Saghafi, Neurologist