Missing Scale?

[Elapidaetion]

My gorgeous pinstripe had her (I initially thought she was a male, vet told me otherwise) first shed in my care about a month and a half ago. It went relatively smoothly: no retained eye caps, barely any shed left on her body, and she was right back to her spunky, social self. However, she seemed to have rubbed too harshly against something and removed an entire scale. There was a little bit of blood, but it wasn't severe. It seems to be healing okay, but I'm concerned about it happening in the future. She is starting to look dull again, and if there are any preventative measures I can take so she doesn't injure herself in her next shed, I will gladly take them. Also, out of curiosity, will that scale grow back?