Hi, I Am A 50 Yr Old Female. Exactly One

hi, I am a 50 yr old female. exactly one month ago I had my L4/L5 fusion surgery (lateral incision on left side) My incision is healing nicely and I have had a follow up with my neurosurgeon in which I was told that the xray looked good. I asked him why my right foot is at least 10 degrees F hotter than my left foot ever since the surgery. He had no idea. I had seen my MD with this problem a week after my surgery and he ordered tests to check for dvt which was negative. He put me on two antibiotics saying it was cellulitis. ( there is a little redness and slight if any swelling) the antibiotics are all gone and I still have a hot foot. Can you help me solve this mytery? thank you!