Shell damage should I be worried?

[Charles S]

Hi all,

So I've noticed that Mrs S has some damage to the exterior of her shell, it seems like the shell has been chipped. I can't think how this has happened except maybe if she'd scraped against the rocks in her enclosure. Is this anything serious? Will the shell grow back? Should I see a vet?

http://imgur.com/a/WKZ5J

She is eating and acting as normal, doesn't seem like she's phases by it at all, still i,'m a little anxious as to what has caused it.

Many thanks
Charles