I have, a hard black bump just inside my lower lip.  I have had it for several months.   It seems to move around .  it is painless and does not seems to have grown much over the last few months.  Sometimes it feels more on the surface and others it seems to hide.  Im very concerned and have been having great anxiety that this could be cancerous.  Please help.
Hi. Thanks for your query. Noted the history and understood your concerns. The commonest cause if hard black bump inside the lower lip that sometimes is prominent and sometimes hides can most probably be due to the following reasons