Hi: As long as she has no other complaints and is otherwise in good health, it sounds like she bit her cheek. It's common in youngsters as more teeth erupt, possibly her baby molars at her age. It's also common for younsters to grind their teeth or clench. Often a bit of cheek will get in between their teeth and cause a hemotoma - blue, raised area and may have a cloudy-white covering. Many times there is no complaint until the next day as it may swell overnight and then feels sore.
The "white" area is probably some tissue beginning to slough off, to deteriorate and it's not a problem.
Meanwhile, just keep an eye on her for a few days. Notice any clenching or grinding of her teeth. If either the "white" area or the "blue" area persist after another 3/4 days, then by all means she should be seen by her dentist.
If it's sore and painful, you can apply some "Orajel" with a Q-tip and it'll give her temporary relief.
I hope I've been helpful, and thank you.
Do you mind taking a look at the picture...it is really blue. Here is the image:
Please click here
I'm very sorry, I'm unable to open your picture attachment - your link takes me to "Word Pad".....can you send it in another format?
Otherwise, being "really blue" is normal in appearance. As any minor bleeding occurs under the surface of the tissue, it coagulates and turns blue......just how bright depends on how thick the tissue covering might be.