I have a white bump in the inside of my bottom lip. It doesn't really hurt. My boyfriend bit my lip yesterday. I also currently have a cold.

Possibly a Mucocele. If your injury was just yesterday, the white bump may be called a mucocele. These are injuries to small salivary glands in the skin of the inside of the lip. These are usually harmless and usually go away without and treatment. Sometimes they persist and may need treatment by a dentist.