It means you need to see a doctor if it keeps up.
This is true. A buddy of mine messed up his shoulder lifting weights and could barely throw a disc. Instead of getting it fixed, he loaded up on his friend's heavy painkillers and kept playing. I was with him when his arm literally stopped working. He threw his drive, shouted something fierce, and the arm just kinda slumped and hung there. Turns out his ligaments and tendons were so weakened with injury that his arm just popped out of it's socket. :gross: