I have got this small bump on my inner lips since long time. It's increasing and decreasing in size on its own. Sometimes its gets a bit bigger and sometimes smaller. No pain nothing. It's just there. But it's bothering me now. I'm afraid if it's something serious. Could it be cause of smoking ? What's the reason and whom to consult? Like dentist or dermatologist? Please look at it and provide some medication for it to go away