Is it dangerous to let your arm fall asleep?

Last night I woke up and couldn’t move my arm, couldn’t feel my arm. I had to move it with my other arm and then I felt the blood starting to flow back in. It happens like once a month if I lie in a weird position. It was dark so I didn’t check the color, but I bet it was blue. After a quite painful five minutes of feeling the blood flowing back I could move my fingers and eventually my whole arm. I lifted my arm all the way up and it was like it weighed a ton. Now, twelve hours later, it’s fine.

Is this dangerous? Can it cause blood clots or something? It can’t possibly be healthy to let your arm be absent of blood for a period of time.