On January 8th of this year I had a spinal fusion of L-4, L-5 and S-1. I have to say that the first three weeks were very very hard...lots of nerve pain...but I made myself "walk through" the pain and still get up several times a day to practice walking. Here it is May of 2014, and I feel a MILLION times better. I have healed a lot, the nerve pain is under control .....very little left, although I am still taking neurontin, and trying to walk for longer periods of time. I also have gone through therapy at the local rehab hospital, and I take a class in warm water therapy twice a week. BUT...I have some popping in one of the ligaments on my left side that radiate kind of into my hip. It really doesn't "hurt", but that side gets tired...and the popping is irritating me. It can be heard by anyone in the room if it is quiet. Occasionally it does not pop......just for a few steps....then it starts again. I am only four months post surgery, and the doctor said I will actually be healing for up to 18 months. Has anyone else had this issue before? I am perplexed. The x-rays the Dr. took post 6 weeks surgery show everything is totally normal. What is causing the popping and is there an exercise I can do for it?