I totally agree with you, @tatjanastan.
Where, in what place we sleep on is very important.
And most importantly how.
Doctors advise to sleep on the back, so that
all communication channels are open.
And you can't sleep on high pillows.
Better as in ancient China to sleep on small rollers.
You should also check the electromagnetic radiation in your home.
It's where your bed is. there are no nearby any high-power devices or electromagnetic radiation?
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Look:
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