I have been getting a weird sensation on the back left of my head. It doesn't necessarilly hurt but i notice thats it is there. I get it at random times during the day and I dont feel necessarilly affected by it memory wise and function wise. Its a little worrisome as I don't know why i get it or why it doesn't hurt like a normal headache. It is hard to explain other than that no specific activity spurs it and it happens at random times. But it is on the back left side of my head.