The feverish child
Fever is a non-specific immune response common to trivial viral infection and life-threatening sepsis alike, so the NICE traffic-light system exists to convert a set of clinical observations into a structured risk stratification that predicts which febrile child is septic.
In a nutshell
Fever is a non-specific pyrogen-driven response that looks identical whether the cause is a trivial virus or invasive sepsis, so severity must be read off physiological compensation, not temperature. The NICE traffic-light system converts colour, activity, respiratory, hydration and specific red-flag features into green/amber/red risk categories, catching the septic child while still compensated.
Classic presentation
A febrile child is assessed against colour, activity, respiratory effort, hydration and specific red-flag features to decide between home management, further assessment, or urgent treatment for sepsis.
Key points
- Temperature height alone does not predict severity: the traffic-light features are markers of physiological compensation and are what actually stratify risk.
- Infants under 3 months get a full septic screen and empirical antibiotics at a low threshold, since serious bacterial infection can present with few other findings at this age.
- Red features (mottled/ashen colour, reduced consciousness, grunting, bulging fontanelle, non-blanching rash) mean urgent assessment and treatment for presumed sepsis.
- Blood pressure falls late in paediatric sepsis; tachycardia, tachypnoea and prolonged capillary refill are the earlier, more useful warning signs.
- Every child managed in the community needs clear safety-netting, because risk category can change as the illness evolves.
First-line investigation
Structured clinical assessment using the NICE traffic-light system, supplemented by a search for a focus of infection.
First-line management
Risk-stratify by traffic-light category: reassurance and safety-netting for green, further assessment/observation for amber, urgent hospital assessment and likely empirical antibiotics for red or infants under 3 months.
Exam traps
- A high fever alone in an otherwise well, alert child with green features does not mandate antibiotics or admission.
- A well-looking infant under 3 months with fever still needs a full septic screen: appearance is unreliable at this age.
- Waiting for hypotension to diagnose shock is too late in children; tachycardia and poor perfusion come first.
- A non-blanching rash with fever is treated as meningococcal disease until proven otherwise, even if the child looks otherwise well.
Educational content pending clinical review. Not medical advice.