I am 66, have always gone to the dentist every 6 months but now I have no dental insurance. Recently, I noticed a space between my lower central and lower lateral tooth (right side)-perhaps it was plaque that fell away-but does not appear to be decay and is not at all tender. However,I am constantly having the inside of my lower lip caught and pinched (quite painfully). Will this cause any type of a tumor on the inside of my lip? And what would the dentist do to alleviate the problem-at the least expense. Thank you.