Observe & prepare safely
Keep a simple fever calendar with measured temperatures and associated rash, mouth ulcers, chest/abdominal pain or joint symptoms. Do not attempt to provoke an episode.
Research orientation · Rheum & Endocrine
Recurrent fevers with negative infection testing: how to make the pattern more informative
Repeated fever episodes are easier to investigate when the timing, measured temperatures, associated symptoms and flare-timed laboratory results are organized together. The goal is to distinguish recurrent infection from inflammatory, autoinflammatory and other pathways without prematurely naming a rare diagnosis.
This page is general research orientation. It cannot diagnose you or determine that it is safe to delay medical care.
Initial research compass
Three ways to make the next step more informative.
Audit records & evidence
Check whether inflammatory markers, ferritin and cultures were obtained during an actual fever episode versus between episodes; collect travel/exposure and medication history.
Bring a focused question to a clinician
Bring the fever pattern to infectious-disease/rheumatology or primary care and ask what findings would separate recurrent infection, inflammatory/autoinflammatory and other causes.
Important: these are research-orientation ideas, not instructions to self-diagnose, stop prescribed treatment, or perform unsafe home testing. If symptoms may be urgent, seek appropriate in-person care first.
Why a deeper interview can help
A short web page cannot reconstruct a longitudinal medical case.
A full WhatDx case can ask follow-up questions based on your answers, review the records you upload, reconstruct chronology, track treatment response and compare competing explanations across specialties. It then produces a research dossier that you can discuss with a clinician.
The free suitability check is the right next step if you want a case-specific answer about whether that process is likely to add value.
Run the free suitability checkCommon questions
Before you use this guide.
Is this page telling me what condition I have?
No. The same symptom pattern can have many causes, and this page does not have your full history, examination or records. It is intended to organize useful questions, not name a diagnosis.
What if my previous tests were “normal”?
Normal results can be genuinely reassuring, but their meaning depends on what was tested, when it was tested and which question the test can actually answer. A research process can help map that context without assuming that “normal” means “nothing is wrong.”
What does the paid WhatDx session provide?
A detailed adaptive interview, record review, a persistent 90-day case state and an evidence-linked research dossier. It is research support, not prescribing or treatment.