painless lump clusters inside corners of mouth - bottom lip

hi everyone - I am new to this website but am glad to be here.  I have bump clusters inside the corners of my mouth - lower lip.  My lips externally appear very normal.  I first felt a lump/bump around six weeks ago in one corner of the mouth.  Then lumps appeared in the other corner.  So now there are clusters on both sides of the inside of my lower lip.  I have researched the website here and it appears mucoceles don't appear in groups as my condition is.  I have used chewing tobacco on and off for 15 years.  Also, I have no other problems (ie, no fever, no vomiting, no diarrehea, no nothing).   These clusters are painless - they do not "pop" on their own and they don't look as big as some of the pictures I have seen on this website.  These bump clusters are also the same color as the interior of my mouth.  They in fact are hard to see when looking in the mirror.  Any thoughts?  Appreciate everyone's input.

valley