I went to the dr. this week because I have been having blood in my stools for the last couple of weeks. I have been extremely tired and my spine and bones have felt like they were burning. I went to the doctor and they sent me to have a CT immediately. They called back today and said that I had a thickening in the walls of my bladder and I needed to get get to a urologist immediately. They said that there has been considerable digenerative of the pelvis, hip, and spine since January. What could this be?