Intermittent Chills Without Fever. Culture And X-ray Test Normal. Diagnosed With Gallbladder Stone.Cause For Chills?
Thanks for asking in Healthcare Magic.
Chills are caused by rapid contraction and relaxation of muscles. Presence of chills is a protective mechanism for the adjustment of body temperature. Chills can also be nonspecific (without any reason).
Anemia can cause chills. Given his age, it is the most likely reason. Have you excluded that possibility? Hypothyroidism can also cause chills due to lowering of body temperature. What is your father's thyroid status?
Some of the antibiotics (Fluroquinolones like Ofloxacin) given in Typhoid fever can cause mild hypoglycemia (reduced blood glucose level) which can result in chills without fever. If he is not a Diabetic, you can try some fruit juice and see if the chills are relieved.
Prostate enlargement can result in retention of urine in bladder causing cystitis (bladder infection). Prostate enlargement is often present in elderly persons. It can be subclinical (minimal) infection as he is already under antibiotic coverage. Cystitis can also result in chills. Since the infection is subclinical, fever may not evident.
I hope this helps.
Regards.