[IanOzsvald]

With our infant using a digital thermometer in the ear, we routinely observe that the left ear is hotter than the right. We take 3 measurements in each ear, we see a similar variance as you mention per ear. Have you observed a similar difference? As adults with the same device we don't see a difference in our own ears.

[kqr]

Sometimes the ears differ, and we use the warmer of the temperatures as our final measurement, as per the instruction booklet of the thermometer. I have not stopped to consider whether this is a consistent chirality bias or just noise!

[yellow_lead]

Maybe it depends on if your child is left brained or right brained (just kidding)

[bombcar]

I wonder if taking a temperature after laying in your side sleeping would noticeably change based on which ear you were sleeping on.

[m463]

These kinds of things make me wonder about body asymmetries - like which side the heart is on, and left/right handedness.