What is meaning of "come undone"?

For example:

And when I start to come undone Stitch me together
[nq:1]What is meaning of "come undone"? For example: And when I start to come undone Stitch me together
"to come undone" means, among other thins "to unravel" - "in teh context of this song perhaps "to fall apart".

Regards, Einde O'Callaghan