Yesterday, I noticed the side of my lip was feeling very sore. It hurt even to open up my mouth. I notice I have a cut on the left side where my top and bottom lip meet. Also, I looked inside of my mouth because I had been feeling bumpy things but I just thought it was from my braces. There are these little white bumps in the inside of my bottom lip. Also, at the top of my top lip there is something that looks like skin is coming off of the inside of my lip. It's completely white and when I went to pull on my lip, it came off. My top and bottom left side of my lips are also very puffy. Usually, if it was from braces it'd be gone by now. Oh, and where the bumps are in the inside, that part of my lip is red on the outside. What is this?