Thanks so much for your reply! I have had 2 CT scans done, both showing that everything is normal. The catheter has moved, but the dr says that is completely normal and will move around whenever anything in my abdomen moves, such as the intestines. They drew blood and did a urinalysis and there does not seem to be any infection. My neurosurgeon does not want to tap the shunt, for fear of introducing infection if there isn't any, and causing *another* revision, which I completely agree with! They have given me valium for the spasm, which seems to help...but makes me soooo tired! I'm thinking, and my surgeon says it is possible, that either the catheter or something the catheter is touching, might touch a nerve every so often, causing the spasm. I'm hoping this goes away soon, I am so ready to get on with my life! I have had improved vision and fewer/ less severe headaches, so the shunt is working, and I am very thankful for this!