Where and how do I best measure body temperature?

I always mess in my mouth, that's enough. It is also useful if you have been measured in the normal state a few times, then you know how the normal temperature is. With me, the usually lies between 35.9 and 36.4 approx. In the morning, 35.9 to 36.0, but when you wake up, the temperature also rises slightly. That's enough. If you feel feverish now, you simply measure and compare with the normal values ​​from "peaceful times". When I measure 37.5 e.g., I know that something is in the bush because I am a degree above the target state.

In fact, I never measure, I've turned it off as a child if you wanted to measure it like that. I don't think I'm unnecessary and I don't like to introduce any items rectally, especially since it's absolutely unpleasant and highly disgusting. And there is no deeper gain of knowledge, therefore obsolete.

Especially practical these infrared hermometers for measuring over the forehead or ear. But here too, reference values ​​are required. It is not about the absolute temperature, but only about the deviation upwards to the norm. If you know its normal temperature, you can also make statements about measured deviations. And only that is relevant, since the least thermometers are likely to be calibrated and that, in addition, the normal temperature can also deviate individually quickly by 0.5 degrees, depending on metabolism etc.