Recurrent or Persisting fevers

Pyrexia of unknown origin (prolonged fevers) often needs inputs from the rheumatologist to look for inflammatory causes of fevers. Other causes such as genetic Systemic Autoinflammatory Diseases(SAID) for recurrent fevers and Primary immunodeficiency (PID) also needs to be kept in the differential diagnosis of a child with multiple fever episodes with infections since an early age.