Desertdweller posted the first time on another thread -
In July of 2010 I had the robotic prostate surgery, I woke up in recovery with so much pain in the posterior that they kept me knocked out with morphine for several hours then more when I got to my room. This was so debilitating that I could not sit in a chair for a week then only on two round pillows separated to prevent pressure on the area. Now a year and a half latter I still have pain every day (although it is much better) and still sit on Coccyx pillows to be comfortable. I accused the hospital of dropping me on my tailbone at some point during or after surgery but they deny that and the surgeon will not discuss or address the problem at all. By the way I have never done a kegel at all and at 30 days was only using a pad every 24 hours and still am for minor leakage. I might add that there is never pain while lying down or standing, just sitting. Two roll pillows separated work well also but do not use the hemorrhoid type pillow.
Someone mentioned taking Amitriptyline, Be careful with that as you have to keep increasing the dose. I lost 10 years of my life on that stuff, complete sexual dysfunction and some other very spooky side effects. As far as I could tell no pain or sleep benefit at all. I was given it for back pain and sleep in a low dose at first then had to take more and more. I finally took myself off it but you need to do that slowly over time.