Hi! Do these bumps that you get cause you any physical discomfort??
My husband gets little "bumps" from time to time on his inner lower lip as well. They do not bother him, nor are they irritated by eating spicy or acidic foods. He went to the doctor once to inquire about cosmetic removal, and the doctor told him the little bumps might be some type of "ulcer" (which I think is a catch all term for we-can't-give-you-an-exact-answer). When they appear they are little, white, and kind of cyst-like. Since they cause no discomfort, the doctor said it would be better if they were left alone. They always disappear on their own. BTW-- my husband does not smoke, drink, or chew either.
Since then, we've talked to others and have found that a lot of people we know get the same thing. Maybe this is something that is rather common??
Unless you are in physical discomfort I would not worry too much about it.
Hope this helps.