i,m a 42 year old man who never had any trauma to my head.about 6 weeks ago i started to get tingling sensation on the back left part of my head.it seems to be getting worse.also have had some nigraines in this period.everyday when i concentrate to much i also get headaches during thid time.also when i stand suddenly i get bad head rushes.i know i need to see a doctor but does anyone have a similar situation.