10 days ago, my husband just removed a stent from a kidney stone.  The last 2 nights he has had a low grade fever around 7pm and then in the middle night he gets night sweats.  He wakes up and feels great, no other symptons.  So what is causing the fever?
His understand your concern. From the history provided it is likely your husband has developed a urinary tract infection following stent removal which is a known complication of the procedure. Please provide a sample of urine for culture at your doctor's office and start on antibiotics as trimethoprim or co-amoxyclauv until the results are back. You could take paracetamol 1gm four times daily, Chat Doctor.