question: I am 70 years old and have prostate cancer with a gleason score of 7. I weigh 175 lbs.i am 5lb 8\". i will be doing Robotic lyproscopic prostascoptomy surgery on the 24th of this month. i have pain in my abdomen and headaches what could be the problem?i am hypertension and had one surgery of removing hernia 15 years ago.