its on my right side, and a few years ago i got hit by a car and then just recently at the beginning of last month i started getting headaches, but they got worst by the end of last month they got worst so i went to my doctor and had an MRI done and found out at the beginning of this week that i had it i just wanted to know what could have caused being at it isnt in my family history and i dont have a history of headaches.