Why is my toddler's fever not coming down?
Last updated September 3, 2026.
Fever medicine lowers the temperature a degree or two - it does not switch it off, and the NHS notes a child's fever usually lasts 3 to 4 days: the return after each dose is the illness, not a failing medicine. Watch the child, not the number: drinking, responding, normal color matter more than 38 versus 39. The override flags: any fever of 38C or more under 3 months old (always urgent), a rash that does not fade under a pressed glass, breathing difficulty, floppy unresponsiveness, a seizure, dehydration signs, or fever past 4 or 5 days.
What to do
- Judge the child, not the thermometer. Drinking, responding, playing in flashes are the vital signs.
- Dose for comfort, expect the return. The fever comes back between doses - normal.
- Know the hard red flags. Under 3 months, non-fading rash, breathing trouble, seizure, floppiness.
- Escalate day 4 or 5. A fever outstaying the usual run earns an exam.
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