If you massage your shoulder/back and you send tingles and prickles down your arm (if upper back) or leg (if upper leg is massaged) does that indicate nerve entrapment or just normal for PN?

Also, does anybody get the feeling that a muscle(s) get stuck? Like I may be sitting crossed legged on the floor and when I get up it feels like a muscle in my leg "pop" into place after being pulled along with the rest. It doesn't hurt at all, just feels uncomfortable...like the muscles aren't working together. It doesn't happen all the time, just sometimes.