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A 40-year-old male asked:

I have an fever of unknown origins for 13 days. we suspect it's some kind of infection. standard tests have been done (blood test for viruses etc), chest x-ray. what other tests can i discuss with my gp to find the root cause of my mystery illness?

2 doctor answers2 doctors weighed in
Dr. Donald Colantino
Internal Medicine 61 years experience
Specialist: Although true fevers of unknown origin are considered by some to be fevers of 3 weeks duration that are undiagnosed while being tested in a hospital or as an outpatient for at least 2days, I recommend that you consult a specialist in infectious diseases for evaluation at this time. Appropriate and thorough testing will be done. Many such fevers turn out to be from noninfectious causes.
Dr. Silviu Pasniciuc
Internal Medicine 27 years experience
FUO: Is considered to be after about 3 weeks, time at which most lingering infections should fade away. Among causes for FUO, autoimmune disorders, malignancies and drug induced are among the most common.

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Last updated Mar 13, 2020

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