Management of Fever and Hallucinations in Children

Immediate Assessment and Risk Stratification

Lumbar puncture is almost always indicated to rule out meningitis in children under 1 year of age, according to the American Academy of Pediatrics 1, 2
Measure blood glucose immediately with a glucose oxidase strip if the child is actively convulsing or unrousable, as recommended by the American Academy of Pediatrics 2
Assess for signs of meningism, systemic illness, or altered mental status in children with fever and hallucinations, as suggested by the American Academy of Pediatrics 2
Perform lumbar puncture if ANY of the following are present: signs of meningism, child is excessively drowsy or irritable, systemically ill appearance, prolonged symptoms or incomplete recovery after one hour, or age less than 12 months, according to the American Academy of Pediatrics 1, 2, 3

Age under 10 years at onset suggests a medical etiology, as reported by the BMJ 1
First episode (no previous identical episodes) suggests a medical etiology, as reported by the BMJ 3
Chronic duration suggests a psychiatric etiology, as reported by the American Academy of Child and Adolescent Psychiatry 2
Onset after 10 years of age suggests a psychiatric etiology, as reported by the American Academy of Child and Adolescent Psychiatry 1
Absence of fever suggests a psychiatric etiology, as reported by the BMJ 3

Infectious diseases are a critical consideration in children with fever and hallucinations, as reported by the BMJ 3

The prognosis for developmental and neurological impairment is excellent after a febrile convulsion, as reported by the BMJ 3
Risk of subsequent epilepsy after a single simple febrile convulsion is approximately 2.5%, as reported by the BMJ and the American Academy of Pediatrics 1, 3
Do not routinely perform EEG, blood urea, serum electrolytes, or serum calcium in most cases of febrile seizures, as recommended by the BMJ 3

Hospitalize if signs of serious infection, meningitis, or systemic illness are present, as recommended by the American Academy of Pediatrics 2

Do not dismiss fever in the context of hallucinations as purely psychiatric - infectious causes (particularly meningitis) must be excluded first, as recommended by the American Academy of Pediatrics 1
Do not delay lumbar puncture in infants under 1 year, as recommended by the American Academy of Pediatrics 1, 2
Do not perform unnecessary investigations (EEG, extensive metabolic panels) in straightforward febrile seizure cases, as recommended by the BMJ 3