I am 52 female. I ve been having severe headaches in the back of my head about every other day/night. I have never had a headache in the back of my head and it feels like my head is fixing to explode, sharp, constant, horrific pain. Nothing helps and they last anywhere from 30 to 3 hrs. I ve had a tumor removed 5/2017 that was vulvar cancer, then 3 lymph nodes in groin 6/17, that were cancer, then 5/11/18 had 10 more nodes removed with a robotic arm. Never had high blood pressure until the past year and only when I go to Dr not when I take it myself, like at CVS. I am not on blood pressure meds either.