I found a lump a few days ago about an inch from my tailbone. It feels hard but I can move it around a little. I do have a indent and the lump is located right in this indent. It doesnt hurt to touch. But I have had alot of lower back pain and numbness down my right leg and across to my hips for about a year. I am about 60 pounds overweight, but I have lost about 25 pounds. I dont know if this lump was there before the weight loss. I did have a high dysplasia colon polyp removed about three weeks ago. I dont know if that would have anything to do with this. If anyone can give me some insight to this problem would be appreciated. thank you