A standard flu fever will hover between 100.4°F and 104°F. If it hits 105°F or higher, that’s when you stop being casual and start freaking out (rightfully so). That’s urgent care territory. Also, if you get a stiff neck, severe headache, or confusion with the fever, that’s not just flu—that’s a potential meningitis shout.
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stages of the stomach flu
But for the average, healthy adult? Your fever is basically throwing a three-to-five-day tantrum. You will survive. You will just feel like a damp dishrag for a while.
When to Stop Waiting and Start Calling
- Fever in an infant under 3 months: call immediately, no questions asked.
- Fever that lasts 5+ days without a break: get checked.
- Fever that returns after being gone for 48 hours: doctor, now.
- If you’re an adult and the fever makes you hallucinate—seriously, just go to urgent care. That’s not a blog moment, that’s a real moment.
