No, never restrict blood flow while sleeping. That’s what I love about the wrist wrap, you don’t have to wrap it tight, just tight enough to keep penis extended, not Ulied. (Is that a word?) Because the wrap is neoprene it keeps tissues warm and extended, and the magnetic therapy increases blood flow to the damaged cells, (or so they say). After an evening of hanging I keep the hanging wrap until I go to bed, then I remove the tighter wrap and just wear the wrist wrap with dick tucked between legs and a pillow tucked up between legs to hold dick in a gentle Fowfer. I’m not advising this, Bib says it is dangerous to wear anything on one’s dick while sleeping, and that is probably good advise, but for me, this feels safe. I am a very light sleeper and with the gazillion gallons of water I consume daily for flaccid hang, I’m a frequent pisser, so I can keep an eye on the wrap, and can piss with it on.
Also, it helps to trim the wrist wrap down from 2” wide to 1” with scissors. Helps to keep it on. When it was 2” wide my dick would usually (turtle) out of it before morning. Maybe this is not safe PEing and not for everyone, but seems to be working for me.
BG