I have been suffering from a blister since long inside the lower lip. It comes and goes away frequently. It starts increasing and becomes like full of blood and then stays 1 day and goes down . Again few days later comes and goes away. I has been doing for about 2 months. I visited Dr. but they could not figure out what is going on.

Does any one has this problem and had this problem in the past. Does anyone knows about this? please help me providing suggestion.

thanks