Pediatric Fever: Symptoms, Causes & Treatment

Pediatric fever is one of the most common complaints in pediatric clinics and emergency departments worldwide. Fever is not a disease itself, but a symptom indicating the immune system's response to infection or inflammation. Doctors define fever in children as an elevated core body temperature above 38°C (100.4°F). While high temperature may be distressing for parents, it is actually a natural defense mechanism that helps the body fight microorganisms.

Most fever cases in children are viral and resolve spontaneously within 3-5 days without complications. However, some cases may be bacterial and require antibiotic treatment. For this reason, a child must be evaluated by a trained physician to determine the underlying cause and initiate appropriate management. The severity of fever depends on the child's age (infants under 3 months are at higher risk), temperature reading, accompanying symptoms, and overall clinical condition.

In Jordan and the Middle East, fever is particularly prevalent during autumn and winter when viral respiratory infections increase, and in summer may occur due to gastrointestinal infections. Prudent management requires knowing when elevated temperature is normal and when urgent medical intervention is needed.

Symptoms of pediatric fever vary depending on the underlying cause and age, but elevated temperature is the main and primary symptom. A child may feel cold and have chills before temperature rises (chilling phase), followed by high fever that may last for several hours. Some children may experience febrile seizures (fever convulsions), which are brief seizure episodes that occur with sudden temperature elevation.

• Elevated body temperature (38°C or higher), potentially reaching 40°C or more.
• Feeling cold, chills, and shivering.
• Fatigue, general weakness, and loss of interest in play.
• Headache, particularly in older children.
• Muscle and joint pain (myalgia and arthralgia).
• Loss of appetite and reluctance to eat.
• Nausea, vomiting, and diarrhea (if infection is in the digestive system).
• Cough, sneezing, and sore throat (if infection is in the respiratory system).
• Red eyes and excessive tearing.
• Swollen tonsils and enlarged lymph nodes in the neck.
• Rash (if viral infection such as chickenpox).
• Irritability and continuous crying in infants; sleepiness and lethargy in older children.

• Viral infections: Most common cause (80% of cases), including influenza, common cold, respiratory syncytial virus (RSV), chickenpox, and measles; usually resolve without specific treatment.
• Bacterial infections: Include ear infections, strep throat, urinary tract infections, and pneumonia; require antibiotic treatment.
• Teething: May cause mild temperature elevation (below 38.5°C) in children aged 6 months to 3 years.
• Vaccinations: May cause low-grade fever within 24-48 hours after immunization as a normal immune response.
• Inflammatory disorders: Such as lupus and juvenile rheumatoid arthritis may cause persistent fever.
• Medications: Certain drugs may cause fever as a side effect (drug fever).
• Emergencies: Including severe dehydration, heat stroke, and poisoning may cause fever.
• Malignancies: Rare but may cause unexplained persistent fever in children.

• Young age: Infants under 3 months are at higher risk for serious infections and complications.
• Immunocompromised state: Children with immune disorders or taking immunosuppressive medications are at higher risk for severe infections.
• Daycare and group settings: Children in daycare or schools face higher concentration of infectious agents.
• Incomplete or no vaccination: Unvaccinated children are at higher risk for serious vaccine-preventable diseases.
• Chronic diseases: Children with chronic heart, lung diseases, or diabetes are at higher risk for complications.
• Malnutrition and poverty: Weakens immune system and increases risk of severe infections.
• Family history: Children whose parents work long hours may experience delayed diagnosis.
• Weak healthcare systems: In poor areas, children may lack access to proper medical care.
• Seasons and weather: Higher infection rates in winter and autumn.
• Direct exposure: Close contact with infected individuals increases risk.

Diagnosis of pediatric fever relies on accurate medical history and comprehensive physical examination. The physician will ask parents about the onset time of fever, recorded temperature readings at home, duration, accompanying symptoms, and any medications given to the child. The doctor then performs a thorough physical examination including temperature measurement (normal value below 37.5°C, fever above 38°C), pulse rate, blood pressure, respiratory rate, and examination of throat, ears, lungs, abdomen, and lymph nodes.

• Temperature measurement: Prefer reliable methods (oral, axillary, or rectal); normal temperature is below 37.5°C, fever defined as 38°C or higher.
• Comprehensive physical examination: Check throat, tonsils, ears, lungs, and abdomen for signs of localized inflammation.
• Complete blood count (CBC): Count white, red blood cells and platelets; elevated WBC suggests bacterial infection, may be normal or slightly low with viruses.
• Blood and urine cultures: Requested when serious bacterial infection suspected, especially in infants and very young children.
• Biochemical tests: May include liver and kidney function tests and inflammatory markers like CRP and ESR.
• Viral tests: Such as rapid influenza test or PCR for detection of known viruses.
• Chest X-ray: May be ordered if pneumonia suspected.
• Ultrasound: May be used to evaluate ear infections or urinary tract infections.

Medications

• Paracetamol (acetaminophen): Safe fever reducer and pain reliever for children, dose 10-15 mg/kg every 4-6 hours, not exceeding 5 doses daily. Not recommended for children under 1 month without doctor consultation.
• Ibuprofen: Effective fever reducer and pain reliever, dose 5-10 mg/kg every 6-8 hours (max 40 mg/kg daily). Not used in children under 6 months. More potent than paracetamol but may cause stomach upset.
• Antibiotics: Used only if bacterial infection confirmed, such as ear infection or strep throat, based on bacterial type and sensitivity.
• Cough and cold medicines: Generally not recommended for children under 4 years; older children may benefit in specific cases.

Procedures and Home Care

• Hydration: Give child plenty of fluids (water, juices, breast milk or formula) to prevent dehydration accompanying fever.
• Lukewarm bath: Bathing in warm water (27-32°C) for 15-20 minutes may help reduce temperature; avoid very cold water as it may cause chills and worsen fever.
• Light clothing: Dress child in light, loose clothing that allows heat dissipation; avoid heavy blankets.
• Rest: Allow child to rest in a quiet, comfortable environment.
• Avoid crowded places: Do not take child to places with other people until fever subsides to prevent transmission.

When Advanced Treatment is Needed

• If fever exceeds 39.5°C and persists despite fever reducers.
• If warning signs appear such as difficulty breathing, unusual rash, or loss of consciousness.
• Infants under 3 months require immediate medical evaluation even for low-grade fever.
• If fever lasts more than 5-7 days without improvement, additional tests may be needed.

• Febrile Seizures: Brief convulsive episodes caused by sudden temperature rise, especially in children aged 6 months to 5 years. Most are benign and resolve without permanent damage, but require immediate monitoring and emergency contact.
• Dehydration: Fluid loss from vomiting, diarrhea, and profuse sweating with fever may lead to low blood pressure and severe weakness.
• Pneumonia: Simple respiratory infection may develop into real pneumonia requiring intensive treatment.
• Meningitis and encephalitis: Rare but serious complications requiring immediate medical intervention, caused by bacterial or viral infection.
• Sepsis: Bloodstream infection spreading throughout the body; acute life-threatening condition requiring intensive hospital care.
• Delirium and confusion: May occur with very high temperatures, especially in young children.
• Permanent brain damage: In very rare cases where temperature reaches 41.5°C or higher.
• Multiple organ failure: In severe sepsis cases, several organs may be affected and become life-threatening.

• Personal hygiene: Wash child's and parents' hands with soap and water frequently, especially before eating, after using bathroom, and when returning from outside.
• Regular vaccinations: Follow immunization schedule recommended by Jordan Ministry of Health to prevent serious infectious diseases like influenza, measles, and mumps.
• Avoid contact with sick people: Keep child away from people with known infections or those coughing and sneezing.
• Ventilate enclosed spaces: Ensure fresh air and natural light enter child's room; avoid crowded and damp places.
• Proper nutrition: Provide balanced healthy food rich in vitamins and minerals to strengthen immune system.
• Adequate sleep: Ensure child sleeps 10-12 hours daily (age-dependent) as sleep strengthens immunity.
• Hygiene with coughing and sneezing: Teach child to cover nose and mouth with tissue when coughing or sneezing.
• Avoid environmental pollutants: Reduce child's exposure to smoke and air pollution.
• Regular doctor checkups: Visit pediatrician periodically to ensure child's health and vaccination status.
• Learn first aid: Parents should learn CPR and first aid to handle emergency situations.