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Wrist Temperature Baseline Deviation

Wrist temperature baseline deviation compares overnight skin temp to your personal rolling average—tag cycle phase and room heat before you treat every rise as fever.

Wrist temperature baseline deviation measures how far last night skin temperature sits from your rolling personal average—not from population fever thresholds. Rings and watches learn your norm over two to four weeks; positive deviation may mean illness, luteal phase, or a warm bedroom.

Negative deviation appears with alcohol, air conditioning, or peripheral vasoconstriction. Compare seven-night direction and tag cycle phase when relevant.

Core thermometer still beats wrist for clinical fever.

Common questions

  • How much temperature deviation is normal?

    Personal baselines vary—menstrual phase alone can shift skin temp several tenths of a degree Celsius. Track your own range over a month before interpreting single-night jumps.

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