Definition of Fever
Fever is defined as a rectal temperature ≥38.0°C (100.4°F). It is a regulated elevation of the body's set-point, driven by pro-inflammatory cytokines (IL-1, IL-6, TNF-α) acting on the hypothalamus. Fever is a physiological response, not a disease.
Key principle: Fever itself is beneficial — it enhances immune function and inhibits microbial replication. Antipyretics are given for comfort, not to prevent febrile convulsions (NICE 2023).
Thermometry Methods
| Route | Normal Range | Clinical Notes | Age Suitability |
|---|
| Rectal | 36.6 – 38.0°C | Most accurate; gold standard. Essential in <3 months. | All ages; preferred <3 months |
| Axillary | 35.9 – 37.3°C | Add 0.5°C to estimate core temp. Lower accuracy; useful in infants when rectal not feasible. | All ages |
| Tympanic | 36.1 – 37.9°C | Accuracy issues in young infants (<3 months): small ear canal distorts reading. Acceptable ≥1 year. | ≥6 months – 1 year preferred |
| Temporal Artery | 36.1 – 37.9°C | Non-invasive; less validated. Avoid if sweating present. | Any age, not preferred <3 months |
| Oral | 35.9 – 37.5°C | Not reliable in young children; requires cooperation. | ≥5 years |
Age-Specific Concern Thresholds
- 1Under 3 months (any fever ≥38°C) — Immediate medical review. Infection risk is high; immune response immature; no reliable localising signs.
- 23–6 months with temp ≥39°C — Urgent review within 2 hours. Risk of serious bacterial infection (SBI) remains elevated.
- 36 months – 5 years — Use NICE traffic light system. Temp alone less predictive; assess clinical features.
- 4Fever >5 days — Investigate; consider Kawasaki disease, EBV, occult bacteraemia.
Physiological Response to Fever
Expected physiological changes:
- Heart rate ↑ ~10 bpm per 1°C rise
- Respiratory rate mildly elevated
- Peripheral vasoconstriction (heat conservation) → flushed then pale
- Increased fluid losses → risk of dehydration
- Reduced appetite; increased metabolic demand
Beneficial effects: Enhanced neutrophil activity, reduced bacterial/viral replication, increased interferon production.
Antipyretic Use — NICE 2023 Key Points
Paracetamol
- 15 mg/kg every 4–6 hours (max 4 doses/24h)
- Safe from birth (term infants)
- First-line antipyretic
Ibuprofen
- 5–10 mg/kg every 6–8 hours (max 3 doses/24h)
- Avoid under 3 months
- Avoid if dehydrated, asthma, renal impairment
NICE 2023 — Do NOT routinely alternate paracetamol and ibuprofen. Consider alternating only if fever/discomfort persists or recurs before next dose — with careful parental education to avoid overdose.
Tepid sponging is NOT recommended. It causes shivering, discomfort, and does not reduce core temperature effectively. Avoid cool/cold water.
NICE Traffic Light System — Fever in Children Under 5
The NICE traffic light system (NG143) guides assessment of serious illness risk. Evaluate the child across all domains; the highest category reached in any domain determines overall risk level.
GREEN — Low Risk
- Normal colour (skin, lips, tongue)
- Responds normally to social cues
- Content / smiles
- Stays awake or wakes quickly
- Strong normal cry / not crying
- Moist mucous membranes
- Normal skin turgor
- No amber / red features
Action: Manage at home. Provide safety-netting advice. Follow-up if worsens or fever >5 days.
AMBER — Intermediate Risk
- Pallor reported by parent/carer
- Not responding normally to social cues
- Wakes only with prolonged stimulation
- Decreased activity / no smile
- Dry mucous membranes
- Poor feeding (infants)
- Reduced urine output
- Tachycardia (age-specific)
- CRT 3 seconds (exactly)
- Fever ≥5 days duration
- Swelling of a limb/joint
- Non-weight bearing / not using limb
- Rigors
- New lump >2 cm
Action: Urgent face-to-face assessment within 2 hours. Consider investigations (FBC, CRP, urine). Refer to paediatric team if no diagnosis.
RED — High Risk
- Pale / mottled / ashen / blue
- No response to social cues
- Appears ill to healthcare professional
- Does not wake / will not stay awake
- Weak, high-pitched or continuous cry
- Tachycardia (severe, age-specific)
- Tachypnoea (age-specific thresholds)
- Nasal flaring / grunting / chest recession
- SpO2 <95% in air
- CRT >3 seconds
- Reduced skin turgor
- Non-blanching rash
- Bulging fontanelle
- Neck stiffness
- Status epilepticus
- Focal neurological signs
- Temp <36°C
- Age <3 months with any fever
Action: IMMEDIATE referral to paediatric emergency. Activate sepsis pathway. Do not delay.
Referral Decision Summary
| Traffic Light | Urgency | Setting | Investigations |
|---|
| GREEN | Home management | Community / GP | Urine dipstick if no source found |
| AMBER | Urgent ≤2 hours | Paediatric assessment unit | FBC, CRP, blood culture, urine MC&S, CXR if respiratory symptoms |
| RED | Immediate / 999 | Paediatric ED / HDU | Full septic screen, lactate, blood gas, LP if safe |
| <3 months | Immediate | Paediatric ED | Full septic screen regardless of appearance |
Upper Respiratory Tract
URTI / Viral Pharyngitis
- Rhinorrhoea, cough, mild sore throat
- Most viral — no antibiotics
- Supportive: fluids, antipyretics
Otitis Media
- Ear pain, tugging ear, irritability
- Otoscopy: red bulging tympanic membrane
- Most viral; antibiotics if <2 years bilateral, or severe/deteriorating
Tonsillitis — Centor/FeverPAIN Score
- Centor criteria: tonsillar exudate, tender anterior cervical lymph nodes, fever, absence of cough (1 point each)
- Score ≥3: consider throat swab ± antibiotics (phenoxymethylpenicillin)
- Score ≤2: likely viral, no antibiotics
Infectious Mononucleosis (EBV)
- Pharyngeal exudate + generalised lymphadenopathy + splenomegaly
- Diagnosis: Monospot (Paul-Bunnell) test; EBV VCA IgM
- Avoid amoxicillin/ampicillin (causes rash)
- Avoid contact sports (splenomegaly — rupture risk)
Lower Respiratory Tract
Pneumonia
- Fever + tachypnoea + reduced air entry ± crackles
- Investigations: raised WBC (>15), elevated CRP (>100 in bacterial), CXR consolidation
- Empirical: amoxicillin PO (community) or IV co-amoxiclav (hospital)
- Atypical (Mycoplasma): clarithromycin
Bronchiolitis (RSV)
- Peak: winter; age <2 years (mainly <6 months)
- Wheeze, fine crackles, subcostal recession, feeding difficulty
- Diagnosis: clinical; RSV PCR nasopharyngeal swab
- Management: supportive — NG feeds if poor oral intake, supplemental O₂ if SpO₂ <92%
- No bronchodilators, steroids, or antibiotics routinely
Urinary Tract Infection (NICE CG54)
Diagnosis by Age
- <3 months: urine culture only (catheter/SPA sample)
- 3 months – 3 years: urine dipstick; if positive → send MSU for MC&S before antibiotics
- >3 years: dipstick (leucocytes + nitrites); treat if positive
Contaminated samples invalidate results. Always use clean-catch or catheter sample in young children.
Management
- Empirical: co-amoxiclav or trimethoprim (local sensitivity patterns — GCC: resistance rates may be higher)
- IV ceftriaxone if systemically unwell or <3 months
- Duration: 7–10 days for febrile UTI (upper tract)
Imaging — Febrile UTI
- Renal tract USS: all children <6 months with febrile UTI (within 6 weeks)
- DMSA scan 4–6 months post-UTI if recurrent / abnormal USS
- MCUG if abnormal USS or recurrent UTIs
Meningitis & Meningococcal Septicaemia
Clinical Features
- Meningitis: fever, severe headache, photophobia, phonophobia, neck stiffness (Kernig's / Brudzinski's), vomiting
- Meningococcal septicaemia: non-blanching petechial/purpuric rash (glass test), shock, rapid deterioration
- Infants: bulging fontanelle, high-pitched cry, opisthotonus
- May have no neck stiffness in children <18 months
Emergency Management
- ABCDE approach — IV access × 2, high-flow O₂
- IV/IM benzylpenicillin immediately (do not wait for LP)
- If penicillin allergy: cefotaxime / ceftriaxone
- IV fluid resuscitation 10 ml/kg boluses
- LP only once haemodynamically stable
- CSF: raised WBC (>10 cells/mm³), low glucose, raised protein
- Notify Public Health / contact prophylaxis (ciprofloxacin/rifampicin)
Glass test: Non-blanching rash = EMERGENCY. Do not wait.
Kawasaki Disease
Diagnosis: Fever ≥5 days PLUS ≥4 of the following 5 clinical features:
Bilateral non-purulent conjunctivitis
Polymorphous rash
Changes in lips/oral mucosa (strawberry tongue, cracked lips)
Changes in extremities (erythema/oedema/periungual desquamation)
Cervical lymphadenopathy ≥1.5 cm
Investigations
- FBC: raised WBC, platelets (elevated week 2–3), raised CRP/ESR
- Echo: coronary artery aneurysms (20–25% if untreated)
- Urine: sterile pyuria
Treatment
- IVIG 2 g/kg single infusion (within 10 days)
- High-dose aspirin (anti-inflammatory) then low-dose (antiplatelet)
- Cardiology review — repeat echo at 6–8 weeks
GCC Note: Kawasaki disease incidence is higher in East Asian children. Be alert in diverse GCC expat populations.
Paediatric Sepsis — NICE NG51
Sepsis in children = life-threatening organ dysfunction caused by a dysregulated host response to infection. Think Sepsis, Act Fast.
Key principle: Children compensate well — hypotension is a LATE and pre-terminal sign of septic shock. Do not wait for hypotension to act.
Paediatric Early Warning Score (PEWS)
PEWS monitors physiological deterioration. Score each domain; escalate if total ≥3 or any single RED parameter.
| Parameter | 0 (Normal) | 1 (Concern) | 2 (High Concern) | 3 (Critical) |
|---|
| Behaviour | Playing / appropriate | Sleeping | Irritable | Lethargic / confused / reduced pain response |
| Cardiovascular | Pink, CRT ≤2s | Pale, CRT 3s, HR +20% above normal | Grey, CRT 4s, HR +30% above normal / below normal | Grey/mottled, CRT ≥5s, HR +40% or bradycardia |
| Respiratory | Normal RR, no recession | RR >10 above normal, mild recession | RR >20 above normal, moderate recession, FiO₂ ≥40% | RR 5 above or below, severe recession, FiO₂ >50% |
GCC Context: PEWS implementation is inconsistent across GCC hospitals. Advocate for standardised scoring at your institution (DHA/DOH requirement in UAE).
Age-Specific Vital Sign Ranges
| Age | HR (bpm) | RR (breaths/min) | Systolic BP (mmHg) | Tachycardia threshold |
|---|
| Neonate (<1 month) | 120–160 | 40–60 | 60–80 | >160 |
| Infant (1–12 months) | 110–160 | 30–40 | 80–100 | >160 |
| 1–2 years | 100–150 | 25–35 | 85–105 | >150 |
| 2–5 years | 95–140 | 25–30 | 90–110 | >140 |
| 5–12 years | 80–120 | 20–25 | 95–115 | >120 |
| 12+ years | 60–100 | 15–20 | 100–120 | >100 |
Paediatric Sepsis Six (within 1 hour)
- 1High-flow oxygen — target SpO₂ ≥94% (≥98% if shock)
- 2Blood cultures — before antibiotics; peripheral + central if available
- 3IV antibiotics — broad-spectrum within 1 hour of recognition (ceftriaxone 50–100 mg/kg/day; add metronidazole if abdominal source)
- 4IV/IO fluid bolus — 10 ml/kg 0.9% NaCl; reassess after each bolus; max 40 ml/kg before considering inotropes
- 5Measure lactate — lactate >2 mmol/L = concern; >4 mmol/L = high risk of poor outcome
- 6Measure urine output — catheterise; target >1 ml/kg/h (infants >2 ml/kg/h)
Antibiotic selection: Meningitis: ceftriaxone 100 mg/kg/day (max 4g) ± dexamethasone. Neonatal sepsis: benzylpenicillin + gentamicin. Always follow local GCC formulary / stewardship protocols.
APLS Weight Estimation & Paediatric Formulas
APLS Weight Formula
1–10 years: Weight (kg) = (Age + 4) × 2
<1 year: Weight (kg) = (Age in months / 2) + 4
>10 years: Weight (kg) = (Age × 3) + 7
Broselow tape provides colour-coded weight and drug dosing — preferred when available in resuscitation settings.
Septic Shock Recognition
- Warm shock: bounding pulses, wide pulse pressure, flash CRT, fever — early
- Cold shock: cool extremities, mottled skin, prolonged CRT (>2s), weak/thready pulse — more common in children
- Hypotension: LATE sign in children — act before this
Hypotension threshold: Systolic BP < 70 + (age × 2) mmHg in children 1–10 years
Antipyretic Dosing Reference
| Drug | Dose | Frequency | Max/24h | Route | Cautions |
|---|
| Paracetamol | 15 mg/kg | Every 4–6 hours | 4 doses (60 mg/kg/day) | PO / PR / IV | Reduce dose in liver disease; hepatotoxic in overdose |
| Ibuprofen | 5–10 mg/kg | Every 6–8 hours | 3 doses (30 mg/kg/day) | PO | Avoid <3 months, dehydration, asthma, renal impairment, varicella |
NICE 2023 guidance: Do NOT routinely alternate antipyretics. Only consider alternating if the child remains uncomfortable between doses, after parental education about dose timing and limits.
Febrile Convulsions
Simple Febrile Convulsion
- Duration <15 minutes
- Generalised tonic-clonic
- Single episode in 24 hours
- No Todd's paresis post-ictally
- Child returns to normal within 1 hour
- Age 6 months – 6 years
- Incidence: 2–4% of children
Complex Febrile Convulsion
- Duration >15 minutes
- Focal onset or focal features
- Multiple episodes in 24 hours
- Todd's paresis present
- Incomplete recovery within 1 hour
Complex febrile convulsions require full investigation (LP, MRI, EEG) and neurology referral.
Nursing Management During Convulsion
- 1Recovery position — lateral, protect airway, never restrain limbs
- 2Time the seizure — start clock immediately
- 3High-flow oxygen — 10–15 L/min via non-rebreather mask
- 4Buccal midazolam 0.5 mg/kg (max 10 mg) — if seizure >5 minutes and no IV access
- 5IV lorazepam 0.1 mg/kg — if IV access available, seizure >5 min
- 6If no response after 10 min: second dose benzodiazepine → call anaesthetics
Parental reassurance (vital): Simple febrile convulsions do NOT cause brain damage or death. Risk of epilepsy is only marginally increased. Antipyretics do NOT prevent recurrence of febrile convulsions.
Parental Education — When to Seek Help (Red Flags)
Seek Emergency Help Immediately
- Non-blanching rash (petechiae/purpura)
- Difficulty breathing / grunting / blue colour
- Seizure or fitting
- Unresponsive / floppy / not waking
- Neck stiffness or photophobia
- Bulging fontanelle (infants)
Seek Urgent Advice (Same Day)
- No wet nappy for ≥8 hours (dehydration)
- Unusual drowsiness / cannot be woken fully
- Persistent high fever >48 hours without improvement
- Fever returning after seeming to improve
- Child looks worse overall (trust parental instinct)
- Baby under 3 months with any fever
Hospital Discharge Safety Netting
- Provide written information in the family's language (Arabic, Urdu, Tagalog, etc. — relevant in GCC)
- Explain expected course: viral fever typically resolves in 3–5 days
- Ensure adequate fluid intake — offer fluids frequently; breast-fed infants: continue feeding
- Explain antipyretic timing clearly — write down schedule to prevent over/underdosing
- Clarify follow-up: GP/clinic if not improving in 48 hours
- Do NOT send home without information if: fever has been >5 days, investigation results pending, or parent has significant anxiety
GCC-Specific Clinical Context
Infectious Disease Burden
- High infectious disease burden due to rapid urbanisation, overcrowded expat worker communities, and varied vaccination histories
- EV-D68 (Enterovirus D68): seasonal outbreaks in GCC; can cause acute flaccid myelitis in children — monitor for limb weakness post-febrile illness
- Hajj pilgrims: respiratory infections (influenza, RSV, Streptococcus pneumoniae) and meningococcal disease — MenACWY vaccine mandatory for Hajj
MERS-CoV in Children
- Middle East Respiratory Syndrome CoV: primarily adult disease with high mortality
- In children: typically mild or asymptomatic — rare severe cases
- Exposure history: camel contact, healthcare worker exposure, nosocomial
- Consider in febrile child with relevant exposure history and respiratory symptoms
Heat Stroke vs Fever — Differential
| Feature | Fever | Heat Stroke |
|---|
| Mechanism | Raised hypothalamic set-point | Overwhelmed thermoregulation |
| Sweating | Present (unless very dehydrated) | Absent (classic) or present (exertional) |
| Response to antipyretics | Yes | No |
| Temp range | 38–41°C typically | Often >40°C |
| Management | Treat underlying cause | Rapid external cooling (ice packs, mist/fan) |
GCC Summer: Outdoor temperatures 45–50°C. Children in hot cars, poor ventilation = heat stroke risk. Antipyretics have NO role in heat stroke.
Language & Cultural Considerations in GCC
- Language barriers: Arabic, Urdu/Hindi, Tagalog, Bengali, Sinhala — major languages of GCC paediatric populations
- Use certified interpreters (not family members as interpreters in clinical decisions — consent/accuracy issues)
- Symptom history from parents can be affected by cultural attitudes to fever — some communities consider fever very dangerous (febriphobia) or conversely undertreated
- Religious considerations: medication timing around prayer times; Ramadan impact on oral medication schedules
- Written discharge advice must be available in Arabic; consider pictographic resources for low-literacy populations
Regulatory & Standards Context
UAE — DHA / DOH
- Dubai Health Authority (DHA) paediatric clinical practice guidelines align with NICE NG143
- DOH Abu Dhabi paediatric fever guidelines: same age thresholds for urgent review
- PEWS mandatory documentation in DHA-licensed hospitals for all paediatric inpatients
- Paediatric sepsis 6 bundle compliance audited
Qatar — QCHP
- Qatar Council for Healthcare Practitioners (QCHP) paediatric nursing standards require competency in febrile illness assessment
- Hamad Medical Corporation paediatric guidelines based on NICE/AAP frameworks
Saudi Arabia — SCFHS
- Saudi Commission for Health Specialties (SCFHS) nursing licensing exam includes paediatric sepsis, traffic light system, and febrile convulsion management
- MOH Saudi Arabia guidelines for paediatric fever in primary care settings
DHA / DOH / SCFHS Exam Preparation
High-yield exam questions on childhood fever for GCC nursing licensing exams:
Q: A 2-month-old infant presents with rectal temp 38.3°C. The infant appears well. What is the priority action?
A: Immediate medical review / refer to paediatric emergency. Any fever ≥38°C in under 3 months = automatic high-risk (NICE red) regardless of appearance.
Q: Which is the most accurate method of temperature measurement in a 6-week-old infant?
A: Rectal thermometry (electronic). Tympanic is unreliable due to small ear canal size in young infants.
Q: A 3-year-old develops a petechial non-blanching rash with fever, is irritable and tachycardic. First priority?
A: Immediate IV/IM benzylpenicillin and emergency transfer. Non-blanching rash = presumed meningococcal septicaemia until proven otherwise.
Q: APLS weight estimation for a 6-year-old child?
A: (6 + 4) × 2 = 20 kg. Formula: (Age + 4) × 2 for children 1–10 years.
Q: A child has a simple febrile convulsion lasting 8 minutes. The nurse's immediate priority?
A: Recovery position, time the seizure, apply high-flow O₂. If still seizing at 5 minutes: administer buccal midazolam 0.5 mg/kg. Reassure parents: does not cause brain damage.
Q: What distinguishes Kawasaki disease from other causes of prolonged fever in a child?
A: Fever ≥5 days PLUS ≥4 of: bilateral non-purulent conjunctivitis, polymorphous rash, mucosal changes (strawberry tongue), extremity changes (erythema/desquamation), cervical lymphadenopathy ≥1.5 cm. Risk: coronary artery aneurysms.
Q: A febrile 4-month-old has temp 39.5°C. NICE traffic light colour?
A: AMBER (at minimum) — age 3–6 months with temp ≥39°C = amber. Requires urgent face-to-face assessment within 2 hours. If any red features present, escalate to RED.
Q: Which component of Sepsis Six should be completed FIRST?
A: All 6 elements should be completed within 1 hour as a bundle. However, high-flow oxygen and IV antibiotics are the most time-critical. Blood cultures must be taken BEFORE antibiotics.
Quick Reference Summary
Fever = rectal ≥38°C
<3 months any fever = immediate
3–6 months ≥39°C = urgent
Antipyretics for comfort, not febrile convulsion prevention
No tepid sponging
Non-blanching rash = emergency
Fever >5 days = investigate for Kawasaki
Sepsis 6 within 1 hour
Paracetamol 15mg/kg q4-6h
Ibuprofen 5–10mg/kg q6-8h
APLS: (Age+4)×2 kg
Febrile convulsion: does NOT cause brain damage