I have a lump on my gum and I'm not sure if I need a dentist or doctor (or nobody).
For background info I have been struggling with pain in an area of my gum and teeth for the past 2 years, the pain seems to flair up and then subside for a few months. This pain spreads all over the side of my face and into my nose.
When the pain flairs up I have seen the dentist and been xrayed and they have not seen anything untoward. I have also been to the Dr who has said it is probably sinusitis and has suggested nasal rinses, prescribed nasal spray and at one time antibiotics.
Just before Christmas I noticed an enlarged lymph node behind my ear which was investigated in hospital due to a history of melanoma. It was all deemed to be fine and a natural response to my body fighting something. (not sure if this is at all relevant but thought I'd add it)
Now for 3 weeks I have had a lump in my gum above where the gum pain occurs. The lump isn't painful but is very red and I can feel tender tubes (sinuses?) above the lump. I have googled this and dental abscess comes up and to visit the dentist.
My questions are...
Would an abscess be more painful to touch?
Should I see the dentist or is it another waste of everyone's time?
Should I see the doctor (is it sinus related)?
Should I leave it if there's no pain?
I just don't know what to do but am concerned at the possibility of it being an abscess and my teeth falling out 
Thanks for reading this far.