My husband had a total knee replacement 5 wks ago and it was to be a revision of the knee pad, but ended up being the total knee, which had been replaced l7 yrs ago....he is 78 and in good health, but this has been a very difficult time of healing....incision closed and looks healthy, doing therapy 3xs a week with flexion at ll5...but the pain is just horrific for him in both legs, mostly in the lower calfs....he experiences periods of being really cold and then feels like a wave of heat internally....what to do?