My husband had foot fusion surgery a week ago, has been home and fine.   He just started with the chills, slight fever and nausea.    Could this be a sign of a possible infection in the foot.   The foot is bandaged, toes appear fine and there is no noticeable difference in foot pain.
These are nonspecific symptoms which can occur with any kind of infection, including a cold or a viral infection. They do not necessarily indicate the foot is infected. If there were an infection in the foot, he would experience local symptoms there, such as redness, swelling, heat and pain. You should let the surgeon know about the fevers and chills. S/he may want to take a look to be sure it's not the foot. If he develops other symptoms such as a sore throat or cough, then its likely due to a virus or other infection, and not his foot. Hope this helps.