Hello Dr, i am having headache at back of my head for the last 10 days. earlier it was intermittent. sometimes it is severe i cannot even shake my head. the pain lasts for 30 minutes to one hour. I am undergoing some stressful pace at work as well personal life. Can this be due to stress ? I dont have any history of head injury , but i have sinus problem which usualy happens once in fortnight. my forehead pains due to this. Whenever i listen to loud noise or some vibrations i feel the pain in the head. i dont have bodypain. but few days back when i had headache, my leftshoulder pained along with few fingers. felt like an electrci current passed through the fingers. I felt it for few seconds, then i was fine. Please advise.