When your arm or leg goes numb, you are NOT cutting off circulation. If you cut off circulation, that would be like putting on a tourniquet which would literally kill your limb. And then kill you. What's actually happening is you're pinching a nerve!

Nerves are like veins but they don't come back full strength right away. It takes time for them to decompress so while they're decompressing your brain is getting weird signals from your nerve that was pinched, and it interprets those as that pins and needles feeling you get after it's coming back! It's probably not great for you, but it's not permanently damaging. This is also why you get numb hands and feet when you get older because your nerves are more fragile as you age and aren't as good at saying uncompressed.

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