Hi, I just want to try to help you out. I have the same problem. Mine is caused from the muscles in the butt that come up from your legs. Your lower back probably hurts too but the butt is worse. At least it is with me, One pain can be dominated by a worse one easily. Well, i am on Zanaflex and Neurotin, i have Dystonia and Epilepsy. Also, most symptoms of Multiple Sclerosis. I still must use cushions to sit on . Not the new expensive ones even those $300.oo ones hurt.The problem is the muscles are drawing up extremly tight. A good help is to streath them out before work , on breaks and lunch. Also i had to take Calcium three times a day. It works best taken with milk or juice or a hot drink like tea. Magniesium and Potassium are very important to relax muscles. I say this because pills do not 'fix' the problem for me. But these all help me very much. Everyone is different. So, you must do as a dr tells you to. I have Dystonia and Epilepsy, and possibel MS. The Advil is really important if taken with all these other things.......because, the pain is increased with inflamation. This is all the way it is with me, anyway. I pray you have or will have your comfort soon. Ps..one thing that helps me at the computer is i place a simi hard pillow down but moved forward just enough that my tail bone is suspended. A special pillow can be bought for hemroid problems..and it works great. It take pressure off of the tender spots. Well, God Bless as you need, amen, hugs