All EMS presentations
PediatricClinical presentation

Pediatric fever / unwell child

A streamlined, differential-led presentation for rapid clinical review.

Clinical snapshot

Twenty-second review

  • Fever in children usually reflects infection, but age, appearance, hydration, immune status, and source determine risk; young infants can deteriorate quickly.
  • Toxic appearance, poor interaction, respiratory distress, non-blanching rash, seizure, dehydration, stiff neck, or a very young febrile infant requires urgent assessment.
  • Keep environmental overheating or post-immunization fever in the differential; overlapping or concurrent illness remains possible.
  • For pediatric fever / unwell child, trends and combinations of findings are more informative than one isolated vital sign.
Differentials

Compare the clinical patterns

The repeated material is grouped inside each possibility. Open only the condition you need.

Serious3 conditions
SepsisTime-sensitive high-risk possibility

HPI

Clarify exact age; duration/max temp; appearance/interaction.

Signs & symptoms

Poor appearance, perfusion change, non-blanching rash, meningism, or age-related risk.

Focused exam

Observe before touching; assess appearance, tone, interaction, work of breathing, circulation to skin, hydration, and age-appropriate neurologic response; Use weight-based and age-specific references for treatment decisions.

Brief pathophysiology

Sepsis may cause pediatric fever / unwell child through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

No single vital sign diagnoses sepsis. New tachypnea, abnormal temperature, tachycardia, or falling pressure—especially with altered mentation or poor perfusion—supports organ dysfunction and urgency.

Respiratory rate (breaths/min)

May rise early

Tachypnea is included in NEWS2 and can precede overt hypotension.

Temperature (°C)

High or low

Absence of fever does not exclude sepsis; hypothermia is concerning.

Heart rate (bpm)

Often rises

Tachycardia is common but may be blunted by age or medication.

Blood pressure (mmHg)

May fall

Relative hypotension and trend matter; profound hypotension can be late.

Front-load in the triage report

  • Sepsis: Poor appearance, perfusion change, non-blanching rash, meningism, or age-related risk.
  • Exact age.
  • Duration/max temp.
MeningitisTime-sensitive high-risk possibility

HPI

Clarify duration/max temp; appearance/interaction; feeding.

Signs & symptoms

Poor appearance, perfusion change, non-blanching rash, meningism, or age-related risk.

Focused exam

Use weight-based and age-specific references for treatment decisions; Observe appearance and interaction, work of breathing, circulation to skin, hydration, fontanelle when relevant, rash, neck, ears, lungs, and abdomen.

Brief pathophysiology

Meningitis may cause pediatric fever / unwell child through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

CNS infection may produce fever and systemic illness, but classic findings and abnormal vitals can be absent. Altered mental status, rash, shock, or seizures increase urgency.

Temperature (°C)

Often elevated

Fever supports infection; normal temperature does not exclude it.

Heart rate (bpm)

May rise

Tachycardia may reflect fever, pain, or sepsis.

Blood pressure (mmHg)

May fall with sepsis

Hypotension suggests systemic involvement or shock.

Blood glucose (mmol/L)

Check early

Glucose disturbance is an important reversible mimic of altered mentation or seizure.

Front-load in the triage report

  • Meningitis: Poor appearance, perfusion change, non-blanching rash, meningism, or age-related risk.
  • Duration/max temp.
  • Appearance/interaction.
Serious bacterial infectionTime-sensitive high-risk possibility

HPI

Clarify appearance/interaction; feeding; wet diapers/urine output.

Signs & symptoms

Poor appearance, perfusion change, non-blanching rash, meningism, or age-related risk.

Focused exam

Use weight-based and age-specific references for treatment decisions; Observe appearance and interaction, work of breathing, circulation to skin, hydration, fontanelle when relevant, rash, neck, ears, lungs, and abdomen.

Brief pathophysiology

Serious bacterial infection may cause pediatric fever / unwell child through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Use current age-specific ranges and the child’s trend, appearance, interaction, work of breathing, and perfusion. Hypotension is a late sign of pediatric shock.

Heart rate (bpm)

Use age-adjusted range

Tachycardia may reflect fever, distress, dehydration, or compensation.

Respiratory rate (breaths/min)

Use age-adjusted range

Tachypnea and work of breathing can be early signs of illness.

Oxygen saturation (SpO₂)

Trend with breathing

Interpret with effort, colour, and the condition-specific oxygen target.

Blood pressure (mmHg)

Hypotension is late

A normal pressure does not exclude compensated pediatric shock.

Front-load in the triage report

  • Serious bacterial infection: Poor appearance, perfusion change, non-blanching rash, meningism, or age-related risk.
  • Appearance/interaction.
  • Feeding.
Common1 condition
Viral illnessCommon presentation pattern

HPI

Clarify exact age; duration/max temp; appearance/interaction.

Signs & symptoms

Well appearance, preserved hydration, and compatible upper-respiratory or gastrointestinal symptoms may occur.

Focused exam

Observe before touching; assess appearance, tone, interaction, work of breathing, circulation to skin, hydration, and age-appropriate neurologic response; Use weight-based and age-specific references for treatment decisions.

Brief pathophysiology

Viral illness may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.

Vital-sign pattern

What the trend may show

Possible pattern

Use current age-specific ranges and the child’s trend, appearance, interaction, work of breathing, and perfusion. Hypotension is a late sign of pediatric shock.

Heart rate (bpm)

Use age-adjusted range

Tachycardia may reflect fever, distress, dehydration, or compensation.

Respiratory rate (breaths/min)

Use age-adjusted range

Tachypnea and work of breathing can be early signs of illness.

Oxygen saturation (SpO₂)

Trend with breathing

Interpret with effort, colour, and the condition-specific oxygen target.

Blood pressure (mmHg)

Hypotension is late

A normal pressure does not exclude compensated pediatric shock.

Front-load in the triage report

  • Well appearance, preserved hydration, and compatible upper-respiratory or gastrointestinal symptoms may occur.
  • Exact age.
  • Duration/max temp.
Mimics2 conditions
Environmental overheatingImportant alternative presentation

HPI

Clarify exact age; duration/max temp; appearance/interaction.

Signs & symptoms

Context may explain temperature but not dangerous physiology.

Focused exam

Observe before touching; assess appearance, tone, interaction, work of breathing, circulation to skin, hydration, and age-appropriate neurologic response; Use weight-based and age-specific references for treatment decisions.

Brief pathophysiology

Environmental overheating can resemble pediatric fever / unwell child through overlapping symptoms or referred physiology despite a different primary mechanism.

Vital-sign pattern

What the trend may show

Possible pattern

Use current age-specific ranges and the child’s trend, appearance, interaction, work of breathing, and perfusion. Hypotension is a late sign of pediatric shock.

Heart rate (bpm)

Use age-adjusted range

Tachycardia may reflect fever, distress, dehydration, or compensation.

Respiratory rate (breaths/min)

Use age-adjusted range

Tachypnea and work of breathing can be early signs of illness.

Oxygen saturation (SpO₂)

Trend with breathing

Interpret with effort, colour, and the condition-specific oxygen target.

Blood pressure (mmHg)

Hypotension is late

A normal pressure does not exclude compensated pediatric shock.

Front-load in the triage report

  • Context may explain temperature but not dangerous physiology.
  • Exact age.
  • Duration/max temp.
Post-immunization feverImportant alternative presentation

HPI

Clarify duration/max temp; appearance/interaction; feeding.

Signs & symptoms

Context may explain temperature but not dangerous physiology.

Focused exam

Use weight-based and age-specific references for treatment decisions; Observe appearance and interaction, work of breathing, circulation to skin, hydration, fontanelle when relevant, rash, neck, ears, lungs, and abdomen.

Brief pathophysiology

Post-immunization fever can resemble pediatric fever / unwell child through overlapping symptoms or referred physiology despite a different primary mechanism.

Vital-sign pattern

What the trend may show

Possible pattern

Use current age-specific ranges and the child’s trend, appearance, interaction, work of breathing, and perfusion. Hypotension is a late sign of pediatric shock.

Heart rate (bpm)

Use age-adjusted range

Tachycardia may reflect fever, distress, dehydration, or compensation.

Respiratory rate (breaths/min)

Use age-adjusted range

Tachypnea and work of breathing can be early signs of illness.

Oxygen saturation (SpO₂)

Trend with breathing

Interpret with effort, colour, and the condition-specific oxygen target.

Blood pressure (mmHg)

Hypotension is late

A normal pressure does not exclude compensated pediatric shock.

Front-load in the triage report

  • Context may explain temperature but not dangerous physiology.
  • Duration/max temp.
  • Appearance/interaction.
Red flags

Findings that should escalate concern

  • Toxic appearance, poor interaction, respiratory distress, non-blanching rash, seizure, dehydration, stiff neck, or a very young febrile infant requires urgent assessment.
  • Sepsis, meningitis, or serious bacterial infection: Poor appearance, perfusion change, non-blanching rash, meningism, or age-related risk.
Related medications

Medication recognition

AmoxicillinCephalexinDoxycycline
Related EMS presentations

Continue the clinical pathway

PediatricPediatric respiratory distressInfectiousSuspected sepsisIntegumentaryRash / skin eruptionPediatricNewborn concernPediatricPediatric seizure
References

Clinical and academic sources

Curated clinical guidance and peer-reviewed evidence supporting this presentation. Current BCEHS guidance, medical direction, and local policy remain authoritative for practice.

BCEHS Handbook — specific CPGs

  1. K02: SepsisBC Emergency Health Services Handbook

    Official BCEHS clinical practice guidance for sepsis.

  2. M00: Pediatrics - GeneralBC Emergency Health Services Handbook

    Official BCEHS clinical practice guidance for pediatrics - general.

Supporting clinical and academic evidence

  1. CEDIS Presenting Complaint List updateCanadian Association of Emergency Physicians

    Presenting-complaint terminology and categorization context. It does not establish a prehospital “top 100” ranking.

  2. Acute Care Committee statements and practice pointsCanadian Paediatric Society

    Canadian pediatric emergency guidance and peer-reviewed clinical practice statements.

  3. Evaluation and Management of Well-Appearing Febrile Infants 8 to 60 Days OldPediatrics · 2021

    Age-specific risk assessment and recognition of serious bacterial infection in febrile infants.