Puppy with a swollen lip? ):?

I have a 6 month old siberian husky and today i noticed when she looked at me that the left side of her mouth was swollen, and it seems to be the gum area. When i pet around that area it doesn't seem to bother her at all, but when i look underneath that area, the gums have darkened spots that the other side does not? other than that, she seems completely normal and her teeth are healthy.