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Surgical tech here (bottom of the medical food chain, so take that for what it's worth [not shit]). Adding to the chorus of "ASK YOUR DOCTOR!!!" bc words from anonymous internet strangers are trash.
...but if it instills a sense of urgency: I've helped with a couple of arm amputations from patients falling asleep on them and cutting off blood circulation to the extent that the tissue dies. Iirc, both of those involved longer-than-normal periods of sleeping on it due to drugs - unsure if there's any risk of that from a normal sleep schedule. But yeah, the various chunks that make up you all need oxygen to do their thing; depriving those chunks of oxygen generally leads to not-so-great outcomes.
I was under the impression that limbs "falling asleep" was more of a nerve thing and not a circulation thing. Is that not true?
Nerves don't like pressure, so that'll definitely irritate them.
Cutting off blood and suddenly restoring it later can cause a similar sensation.
Actual tissue death though is gonna be from blood loss.