{"id":"3ff6983e531c4729c9f47a9df6533af4","slug":"8-year-old-have-fever-only-night-4-days-with-no-daytime","question":"Why does my 8 year old have a fever only at night for 4 days with no daytime symptoms?","answer":"Your child's fever pattern is actually very common and follows their body's natural daily rhythm. Temperatures naturally dip in the early morning—research tracking over 28,000 fever episodes in children found readings were lowest around 6am (averaging 38.25°C) and highest around 11pm (38.93°C). A child who feels fine during the day isn't fever-free; their temperature simply follows this 24-hour cycle. The fever appearing only at night for four days fits this pattern perfectly.\n\nThat said, the fact that this has been going on for four days matters. While a daily temperature rhythm is normal, a fever persisting for that length of time warrants a call to your pediatrician, especially to rule out anything that needs attention. If your child also develops a rash, swollen hands or feet, or red eyes alongside the fever, contact your doctor right away, as these can signal conditions that need prompt treatment.","sources":"[{\"pmid\":\"42563156\",\"title\":\"Diurnal variations of fever in children: results from an app-based observational study.\",\"journal\":\"BMC pediatrics\",\"year\":\"2026\",\"url\":\"https://pubmed.ncbi.nlm.nih.gov/42563156/\",\"score\":0.78},{\"pmid\":\"26154665\",\"title\":\"The Complexities of the Diagnosis and Management of Kawasaki Disease.\",\"journal\":\"Infectious disease clinics of North America\",\"year\":\"2015\",\"url\":\"https://pubmed.ncbi.nlm.nih.gov/26154665/\",\"score\":0.76}]","thread_json":null,"topic":"fever-and-illness","view_count":0,"created_at":"2026-10-31T23:00:57.258Z"}