05/05/2026
YOUR ARM IS NOT “ASLEEP”… YOUR NERVE IS BEING COMPRESSED WHILE YOU SLEEP
If you wake up in the middle of the night and your arm feels numb, heavy, or completely “dead,” it might seem like a circulation problem. But in most cases, that’s not what’s happening.
The real cause is usually nerve compression.
When you sleep in certain positions—especially with your arm under your head or your shoulder rotated forward—you create pressure around the nerves that travel from your neck into your arm. These nerves form what’s called the brachial plexus.
When that pathway is compressed, the signal between your brain and your arm gets disrupted. That’s what creates the numbness, tingling, and “pins and needles” feeling.
That’s also why the sensation disappears quickly when you change position. The moment the pressure is removed, the signal returns.
This is not a blood flow issue.
It’s a temporary nerve signal block caused by sleep position.