What Are Fever Dreams? (And Why They’re So Weird!)

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**Title: What Are Fever Dreams and Why Do They Happen?**

Have you ever had a bizarre, intense dream when you were sick with a fever? Those are called *fever dreams* — vivid, often disturbing dreams that occur during a high body temperature. But what causes them?

Fever dreams happen when your body’s core temperature rises, usually above 100.4°F (38°C). This elevated temperature can affect brain function, especially in the hypothalamus — the part of the brain responsible for regulating sleep, body temperature, and emotions. As your brain works harder to cool down, normal REM (rapid eye movement) sleep can be disrupted, leading to fragmented, emotionally charged dreams.

Research shows fever dreams are often more negative than regular dreams — involving themes of fear, confusion, or surreal imagery. Your brain is literally “overheating,” which can cause abnormal sensory processing and vivid, chaotic storytelling in your sleep.

They’re more common in adults than kids and usually harmless, though they can feel unsettling. If you want to reduce the chances of experiencing them, stay hydrated, rest well, and take steps to lower your fever when sick.

In short: fever dreams are your brain’s way of dealing with stress and temperature imbalance — a surreal side effect of your immune system in overdrive.