A member asked:

How reliable are forehead thermometers?i felt a bit feverish & i decided to check my temperature,but it keeps varying from 36.5 to 38c.what do i do?

A doctor has provided 1 answer
Dr. Milton Alvis, jr answered

Specializes in Preventive Medicine

forehead thermometers may be quite accurate yet simultaneously very misleading. Why? Because they measure local skin temp, not core body temp, the key concern. When brain wants core temp to ↑, blood flow to skin & skin temp ↓es to minimize heat loss, & visa versa. Stomach, bladder, rectal temp most reliable indicators, under tongue next best. Skin temp of very limited value, often misleading.

Answered Aug 11, 2020

3.3k views

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