Suggest Treatment For Headache

been getting these throbbing headachs at the back of the head. when i sleep at night and wake up everything is ok for a bit and then it starts up slowly. but sometimes if i dont move my head the pain goes away a little. but after i get up it comesback. when i look up or something the pain hurts pretty bad. my necks not sore. in 19, never drank or done drugs and i dont play any sports. so i would like to know whats making these throbbing pains and how can i stop them.