I am almost 5 weeks post op now and, as I mentioned before, had been plagued with my temperature rising and chills in the early evening. The first couple of evenings after being discharged the temp rose to about 101 then about 101.5 and on the 3rd day it rose to about 102. That's when they readmitted me for another fun week but they never did find a reason for the temps. After being discharged the second time, I started with the temperature rises again but they never rose above 101.4 and so I never called the hospital to report them. I noticed the temperature swings had been higher with increased exercise, but have now slowly gotten lower to a point where I'm not checking it anymore. This week I pushed myself on Wednesday and did a 9 mile walk at 3.0 mi/hr but found that I was almost of energy at about 7.5 so the last 1.5 miles were difficult. My temperature did go up about an hour after the walk but only about a degree. Has anyone had a similar problem with temperature rises following exercise?