What causes my arms to fall asleep at night?
There are a possible combination of reasons that can make your arm fall asleep (many have been answered here).
It does depend on your other symptoms. Do you experience it only as you fall asleep at night? As many have asked here, is tingling involved? Are you in a particular position?
A doctor, chiropractor or physiotherapist could provide an educated guess, however, both answering these questions as well as testing could reveal the answer more clearly.
Many factors and conditions can give similar symptoms (a pinched nerve, back problems, disease, or even a viral condition) – it may be simple prolonged pressure to one side. It may even be a combination of factors that have been previously mentioned on this forum.
Both answering these questions, and tuning in to what position your body is in, can often yield a simple answer. I hesitate to advise without more clarity to your situation. Your question does not provide much information.
Please provide more detail about your circumstances. Also, understand that, although this panel is knowledgeable and can provide sound advice, if your circumstances do not clear up, it is always a good practice to go for further testing.
In lay man terms, there is pressure building up in those arms!
You probably rolled over to one of your arms and constricted them causing it to go numb.
Quick fix: get that blood pumping, shake the numb bit to get circulation going again. If it doesn’t work in about 5 minutes, go seek some medical help as it may be something more serious.